MESON Chess Problem Database
Problem Display
PID: 61239 (4Q1BB/n1n1pp2/1p6/1Pk1N2R/p1N1P3/P4P2/1P2K3/3R4 w - - 0 1)
Retter, Yosef
StrateGems, 2005
#2
13 + 7
SOLUTION
- SOUND
- Sets
- 1...Saxb5
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sa6
- 2.Rd5#
- 1...Se6
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...Sxe8
- 2.Rd5#
- 1...f5
- 2.Sd3#
- 1...f6
- 2.Sd7#
- 1...Saxb5
- Tries
- 1.Ke1?
- 1...Saxb5
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 1...Sxe8
- 2.Rd5#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- 1...Sd5
- 2.Rxd5#
- 1...Sa6
- 2.Rd5#
- 1...Se6
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...f5
- 2.Sd3#
- 1...f6
- 2.Sd7#
- 1...e6!
- 1...Saxb5
- 1.Kf1?
- 1...Saxb5
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 1...Sxe8
- 2.Rd5#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- 1...Sd5
- 2.Rxd5#
- 1...Sa6
- 2.Rd5#
- 1...Se6
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...f5
- 2.Sd3#
- 1...f6
- 2.Sd7#
- 1...e6!
- 1...Saxb5
- 1.Kf2?
- 1...Saxb5
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 1...Sxe8
- 2.Rd5#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- 1...Sd5
- 2.Rxd5#
- 1...Sa6
- 2.Rd5#
- 1...Se6
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...f5
- 2.Sd3#
- 1...f6
- 2.Sd7#
- 1...e6!
- 1...Saxb5
- 1.Ke3?
- 1...Sd5+
- 2.Rxd5#
- 1...Saxb5
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 1...Sxe8
- 2.Rd5#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- 1...Sa6
- 2.Rd5#
- 1...Se6
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...f5
- 2.Sd3#
- 1...f6
- 2.Sd3#
- 2.Sd7#
- 1...e6!
- 1...Sd5+
- 1.Se3?
- threat
- 2.Sd7#
- 1...Saxb5
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 1...Sd5
- 2.Rxd5#
- 1...f5!
- threat
- 1.Sa5?
- threat
- 2.Sb7#
- 2.Sd7#
- 1...Sxe8
- 2.Sd7#
- 2.Rd5#
- 1...Sc6
- 2.Sd7#
- 2.Qxc6#
- 1...Sd5
- 2.Sb7#
- 2.Rxd5#
- 1...f5
- 2.Sb7#
- 1...bxa5!
- threat
- 1.Sd6?
- threat
- 2.Sd7#
- 2.Sb7#
- 1...Saxb5
- 2.Sb7#
- 2.Qc6#
- 1...Scxb5
- 2.Sb7#
- 2.Rd5#
- 1...Sxe8
- 2.Sd7#
- 2.Rd5#
- 1...Sd5
- 2.Sb7#
- 2.Rxd5#
- 1...Sc6
- 2.Sd7#
- 2.Qxc6#
- 1...exd6!
- threat
- 1.Bxf7?
- threat
- 2.Sd3#
- 2.Sd7#
- 1...Saxb5
- 2.Sd3#
- 2.Qc6#
- 1...Scxb5
- 2.Sd3#
- 2.Rd5#
- 1...Sd5
- 2.Rxd5#
- 1...Se6
- 2.Rd5#
- 1...e6!
- threat
- 1.Bf6?
- threat
- 2.Bxe7#
- 1...Saxb5
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 1...Sxe8
- 2.Rd5#
- 1...Sc6
- 2.Qxc6#
- 1...e6
- 2.Be7#
- 1...Sc8
- 2.Qc6#
- 1...Sd5
- 2.Rxd5#
- 1...exf6!
- threat
- 1.Rc1?
- threat
- 2.Sd3#
- 2.Sd7#
- 1...Kd4
- 2.Sc6#
- 1...Saxb5
- 2.Sd3#
- 1...Scxb5
- 2.Sd3#
- 1...Sd5
- 2.Sd3#
- 1...f5
- 2.Sd3#
- 1...f6!
- threat
- 1.Rd2?
- 1...Saxb5
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 1...Sxe8
- 2.Rd5#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- 1...Sd5
- 2.Rxd5#
- 1...Sa6
- 2.Rd5#
- 1...Se6
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...f5
- 2.Sd3#
- 1...f6
- 2.Sd7#
- 1...e6!
- 1...Saxb5
- 1.Rd8?
- 1...Saxb5
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 1...Sxe8
- 2.Rd5#
- 1...Sc6
- 2.Qxc6#
- 1...Sd5
- 2.Rxd5#
- 1...Sc8
- 2.Qc6#
- 1...Sa6
- 2.Rd5#
- 1...Se6
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...f5
- 2.Sd3#
- 1...f6
- 2.Sd3#
- 1...e6!
- 1...Saxb5
- 1.Rf5?
- 1...Saxb5
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 1...Sxe8
- 2.Rd5#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- 1...Sd5
- 2.Rxd5#
- 1...Sa6
- 2.Rd5#
- 1...Se6
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...f6
- 2.Sd7#
- 1...e6!
- 1...Saxb5
- 1.Rg5?
- 1...Saxb5
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 1...Sxe8
- 2.Rd5#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- 1...Sd5
- 2.Rxd5#
- 1...Sa6
- 2.Rd5#
- 1...Se6
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...f5
- 2.Sd3#
- 1...f6
- 2.Sd7#
- 1...e6!
- 1...Saxb5
- 1.Qd7?
- 1...Saxb5
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 2.Qd5#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- 1...Sd5
- 2.Rxd5#
- 2.Qxd5#
- 1...Sa6
- 2.Rd5#
- 2.Qd5#
- 1...Se6
- 2.Rd5#
- 2.Qd5#
- 1...Sa8
- 2.Rd5#
- 2.Qd5#
- 1...Se8
- 2.Rd5#
- 2.Qd5#
- 1...f5
- 2.Sd3#
- 1...f6
- 2.Sd3#
- 1...e6!
- 1...Saxb5
- 1.Qb8?
- threat
- 2.Qxb6#
- 1...Kxb5
- 2.Qxb6#
- 1...Sd5
- 2.Rxd5#
- 1...Sa8
- 2.Rd5#
- 1...Sc8!
- threat
- 1.b3?
- threat
- 2.Sd3#
- 2.Sd7#
- 2.b4#
- 1...Saxb5
- 2.Sd3#
- 2.Qc6#
- 2.b4#
- 1...Scxb5
- 2.Sd3#
- 2.Rd5#
- 2.b4#
- 1...Sxe8
- 2.Sd3#
- 2.Sd7#
- 2.Rd5#
- 1...Sc6
- 2.Sd3#
- 2.Sd7#
- 2.Qxc6#
- 1...Sd5
- 2.Sd3#
- 2.Rxd5#
- 1...Sa6
- 2.Sd3#
- 2.Sd7#
- 2.Rd5#
- 1...f5
- 2.Sd3#
- 2.b4#
- 1...f6
- 2.Sd7#
- 2.b4#
- 1...axb3!
- threat
- 1.f4?
- 1...Saxb5
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 1...Sxe8
- 2.Rd5#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- 1...Sd5
- 2.Rxd5#
- 1...Sa6
- 2.Rd5#
- 1...Se6
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...f5
- 2.Sd3#
- 1...f6
- 2.Sd7#
- 1...e6!
- 1...Saxb5
- 1.Ke1?
- Keys
- 1.Bg7!
- 1...Saxb5
- 2.Qc6#
- 1...Scxb5
- 2.Rd5#
- 1...Sxe8
- 2.Rd5#
- 1...Sc6
- 2.Qxc6#
- 1...e6
- 2.Bf8#
- 1...Sc8
- 2.Qc6#
- 1...Sd5
- 2.Rxd5#
- 1...Sa6
- 2.Rd5#
- 1...Se6
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...f5
- 2.Sd3#
- 1...f6
- 2.Sd7#
- 1...Saxb5
- 1.Bg7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(d);N_GUARD::QAR1(K),XS(d)
- S(d);N_GUARD::QAR1(K)
- S(e);N_GUARD,XP(H)::R1(A)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- S(e);N_GUARD,XQ(K)::R1(A)
- P(g);::S(I)
- P(g);::R(J)+S(I),DCHECK
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(e);N_GUARD,XP(H)::R1(A)
- S(e);N_GUARD,XQ(K)::R1(A)
- S(d);N_GUARD::QAR1(K),XS(d)
- S(d);N_GUARD::QAR1(K)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- P(g);::S(I)
- P(g);::R(J)+S(I),DCHECK
- Refutation
- P(f);
- Try
- K(C);S_FLIGHT
- Vars
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(e);N_GUARD,XP(H)::R1(A)
- S(e);N_GUARD,XQ(K)::R1(A)
- S(d);N_GUARD::QAR1(K),XS(d)
- S(d);N_GUARD::QAR1(K)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- P(g);::S(I)
- P(g);::R(J)+S(I),DCHECK
- Refutation
- P(f);
- Try
- K(C);P-FLIGHT
- Vars
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(e);N_GUARD,XP(H)::R1(A)
- S(e);N_GUARD,XQ(K)::R1(A)
- S(d);N_GUARD::QAR1(K),XS(d)
- S(d);N_GUARD::QAR1(K)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- P(g);::S(I)
- P(g);::R(J)+S(I),DCHECK
- Refutation
- P(f);
- Try
- K(C);P-FLIGHT
- Vars
- S(e);CHECK,N_GUARD::R1(A),XS(e)
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(e);N_GUARD,XP(H)::R1(A)
- S(e);N_GUARD,XQ(K)::R1(A)
- S(d);N_GUARD::QAR1(K),XS(d)
- S(d);N_GUARD::QAR1(K)
- S(e);N_GUARD::R1(A)
- P(g);::S(I)
- Refutation
- P(f);
- Try
- S(F);
- Threat
- R(J)+S(I),DCHECK
- Vars
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(e);N_GUARD,XP(H)::R1(A)
- S(e);N_GUARD::R1(A),XS(e)
- Refutation
- P(g);
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- P(g);::S(F)
- Refutation
- P(c);XS(F)
- Try
- S(F);
- Threat
- DUALS(2)
- Refutation
- P(f);XS(F)
- Try
- B(L);XP(g)
- Threat
- DUALS(2)
- Vars
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- P(f);
- Try
- B(M);
- Threat
- B(M),XP(f)
- Vars
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(e);N_GUARD,XP(H)::R1(A)
- S(e);N_GUARD,XQ(K)::R1(A)
- S(d);N_GUARD::QAR1(K),XS(d)
- P(f);::B(M)
- S(d);N_GUARD::QAR1(K)
- S(e);N_GUARD::R1(A),XS(e)
- Refutation
- P(f);XB(M)
- Try
- R(A);
- Threat
- DUALS(2)
- Vars
- K(b);S_FLIGHT::B(M)+S(I),DCHECK
- S(d);XP(H)::R(J)+S(I),DCHECK
- S(e);XP(H)::R(J)+S(I),DCHECK
- S(e);::S(I)
- P(g);::S(I)
- Refutation
- P(g);
- Try
- R(A);
- Vars
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(e);N_GUARD,XP(H)::R1(A)
- S(e);N_GUARD,XQ(K)::R1(A)
- S(d);N_GUARD::QAR1(K),XS(d)
- S(d);N_GUARD::QAR1(K)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- P(g);::S(I)
- P(g);::R(J)+S(I),DCHECK
- Refutation
- P(f);
- Try
- R(A);
- Vars
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(e);N_GUARD,XP(H)::R1(A)
- S(e);N_GUARD,XQ(K)::R1(A)
- S(d);N_GUARD::QAR1(K),XS(d)
- S(e);N_GUARD::R1(A),XS(e)
- S(d);N_GUARD::QAR1(K)
- S(e);N_GUARD::R1(A)
- P(g);::S(I)
- P(g);::R(J)+S(I),DCHECK
- Refutation
- P(f);
- Try
- R(J);
- Vars
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(e);N_GUARD,XP(H)::R1(A)
- S(e);N_GUARD,XQ(K)::R1(A)
- S(d);N_GUARD::QAR1(K),XS(d)
- S(d);N_GUARD::QAR1(K)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- P(g);::R(J)+S(I),DCHECK
- Refutation
- P(f);
- Try
- R(J);
- Vars
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(e);N_GUARD,XP(H)::R1(A)
- S(e);N_GUARD,XQ(K)::R1(A)
- S(d);N_GUARD::QAR1(K),XS(d)
- S(d);N_GUARD::QAR1(K)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- P(g);::S(I)
- P(g);::R(J)+S(I),DCHECK
- Refutation
- P(f);
- Try
- Q(K);
- Vars
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(d);N_GUARD::QAR1(K),XS(d)
- S(d);N_GUARD::QAR1(K)
- P(g);::S(I)
- P(g);::R(J)+S(I),DCHECK
- Refutation
- P(f);
- Try
- Q(K);
- Threat
- QAB1(K),XP(c)
- Vars
- K(b);P-FLIGHT,P_SPINP(c),XP(H)::QAR1(K),XP(c)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- S(d);
- Try
- P(B);
- Threat
- DUALS(3)
- Refutation
- P(a);XP(B)
- Try
- P(E);
- Vars
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(e);N_GUARD,XP(H)::R1(A)
- S(e);N_GUARD,XQ(K)::R1(A)
- S(d);N_GUARD::QAR1(K),XS(d)
- S(d);N_GUARD::QAR1(K)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- P(g);::S(I)
- P(g);::R(J)+S(I),DCHECK
- Refutation
- P(f);
- Try
- Actual
- B(M);
- Vars
- S(d);N_GUARD,XP(H)::QAR1(K)
- S(e);N_GUARD,XP(H)::R1(A)
- S(e);N_GUARD,XQ(K)::R1(A)
- S(d);N_GUARD::QAR1(K),XS(d)
- P(f);OGATEB::B(M)
- S(d);N_GUARD::QAR1(K)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- P(g);::S(I)
- P(g);::R(J)+S(I),DCHECK
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).