MESON Chess Problem Database
Problem Display
PID: 137492 (bq2r3/3Q4/5pp1/2PPkBb1/7p/4p1nK/2n4B/3RNR2 w - - 0 1)
Ellerman, Arnoldo
Themes-64, 1958
#2
9 + 11
SOLUTION
- SOUND
- Sets
- 1...Qd6
- 2.Qxd6#
- 1...Qa7
- 2.Qd6#
- 1...Qc7
- 2.Qxc7#
- 1...Qb1
- 2.Qxe8#
- 2.Qd6#
- 2.Qc7#
- 1...Qb2
- 2.Qxe8#
- 2.Qd6#
- 2.Qc7#
- 1...Qb3
- 2.Qxe8#
- 2.Qd6#
- 2.Qc7#
- 1...Qb4
- 2.Qxe8#
- 2.Qd6#
- 2.Qc7#
- 1...Qb5
- 2.Qd6#
- 2.Qc7#
- 1...Qb7
- 2.Qd6#
- 1...Qc8
- 2.Qd6#
- 1...Re6
- 2.Qxe6#
- 1...Re7
- 2.Qxe7#
- 1...Rc8
- 2.Qe6#
- 2.Qe7#
- 1...Rd8
- 2.Qe6#
- 2.Qe7#
- 1...Rf8
- 2.Qe6#
- 2.Qe7#
- 1...Rg8
- 2.Qe6#
- 2.Qe7#
- 1...Rh8
- 2.Qe6#
- 2.Qe7#
- 1...Bf4
- 2.Sf3#
- 1...Bxd5
- 2.Rxd5#
- 2.Qxd5#
- 1...Sd4
- 2.Sd3#
- 1...gxf5
- 2.Qxf5#
- 1...Qd6
- Tries
- 1.Bxg3+?
- 1...Bf4
- 2.Sf3#
- 2.Bxf4#
- 1...hxg3!
- 1...Bf4
- 1.Bxg6?
- threat
- 2.Qf5#
- 1...f5
- 2.Qxf5#
- 1...Re6
- 2.Qxe6#
- 1...Bf4
- 2.Sf3#
- 1...Sd4
- 2.Sd3#
- 1...Qc8!
- threat
- 1.Rd4?
- threat
- 2.Sf3#
- 2.Re4#
- 1...Bxd5
- 2.Rxd5#
- 2.Qxd5#
- 1...Sxe1
- 2.Re4#
- 1...Sxd4
- 2.Sd3#
- 1...gxf5
- 2.Sf3#
- 1...Qd6
- 2.Sf3#
- 1...Qb4
- 2.Sf3#
- 1...Re6
- 2.Re4#
- 1...Bf4
- 2.Sf3#
- 1...Kxd4!
- threat
- 1.Rf4?
- threat
- 2.Sd3#
- 2.Re4#
- 1...Bxf4
- 2.Sf3#
- 1...Bxd5
- 2.Sd3#
- 1...Sxe1
- 2.Re4#
- 1...Sxf5
- 2.Sd3#
- 2.Sf3#
- 1...gxf5
- 2.Sd3#
- 1...Qd6
- 2.Re4#
- 2.Qxd6#
- 1...Qb3
- 2.Re4#
- 2.Qd6#
- 2.Qc7#
- 1...Qb4
- 2.Sd3#
- 2.Qd6#
- 2.Qc7#
- 1...Qb5
- 2.Re4#
- 2.Qd6#
- 2.Qc7#
- 1...Re6
- 2.Sd3#
- 1...Sb4
- 2.Re4#
- 1...Se4
- 2.Sf3#
- 2.Rxe4#
- 1...Kxf4!
- threat
- 1.Bxg3+?
- Keys
- 1.Qa4!
- threat
- 2.Qe4#
- 1...Bxd5
- 2.Sd3#
- 1...gxf5
- 2.Sf3#
- 1...Bf4
- 2.Qxf4#
- 1...Sd4
- 2.Qxd4#
- 1...Qb4
- 2.Qxe8#
- 1...Sb4
- 2.Qa1#
- threat
- 1.Qa4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- Q(j);N_GUARD::QAB1(I),XQ(j)
- Q(j);N_GUARD::QAB1(I)
- Q(j);N_GUARD::QAB(I),XQ(j)
- R(k);N_GUARD::QAR1(I),XR(k)
- R(k);N_GUARD::QAR2(I),XR(k)
- B(f);N_SPINS(c),SBLOCK::S(B)
- S(a);SBLOCK::S(B)
- P(h);OGATE,XB(H)::QAR1(I),XP(h)
- Tries
- Try
- B(D);CHECK,XS(c)
- Refutation
- P(d);XB(D)
- Try
- B(H);XP(h)
- Threat
- QAR1(I)
- Vars
- P(g);::QAR1(I),XP(g)
- R(k);N_GUARD::QAR1(I),XR(k)
- B(f);N_SPINS(c),SBLOCK::S(B)
- S(a);SBLOCK::S(B)
- Refutation
- Q(j);P_PINQ(I)
- Try
- R(A);
- Threat
- DUALS(2)
- Vars
- S(a);XS(B)::R1(A)
- S(a);SBLOCK,XR(A)::S(B)
- P(h);XB(H)::S(B)
- Q(j);::S(B)
- R(k);::R1(A)
- B(f);N_SPINS(c)::S(B)
- Refutation
- K(e);N_SPINS(c),S_FLIGHT,XR(A)
- Try
- R(C);N_PINS(c)
- Threat
- DUALS(2)
- Vars
- B(f);SBLOCK,XR(C)::S(B)
- B(i);XP(G)::S(B)
- S(a);XS(B)::R1(C)
- P(h);XB(H)::S(B)
- R(k);::S(B)
- S(a);::R1(C)
- Refutation
- K(e);P_SPINS(c),S_FLIGHT,XR(C)
- Try
- Actual
- Q(I);
- Threat
- QAR1(I)
- Vars
- B(i);SBLOCK,XP(G)::S(B)
- P(h);SBLOCK,XB(H)::S(B)
- B(f);N_GUARD,N_SPINS(c)::QAB1(I),XB(f)
- S(a);N_GUARD::QAB1(I),XS(a)
- Q(j);N_GUARD::QAR(I),XR(k)
- S(a);N_GUARD,S_CUTQ(j)::QAB(I)
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).