MESON Chess Problem Database
Problem Display
PID: 257 (1n3Nr1/p3B1PB/1p3P2/2PpkN2/R3P2K/2P2R1p/1Q1P1n2/5q2 w - - 0 1)
Valve, Leo Erland
Suomen Shakki, 1950
#2
14 + 9
SOLUTION
- SOUND
- Sets
- 1...Sxe4
- 2.d4#
- 1...dxe4
- 2.c4#
- 1...bxc5
- 2.Qxb8#
- 1...Sxe4
- Tries
- 1.Se3?
- threat
- 2.Bd6#
- 2.Rf5#
- 2.d4#
- 1...Sxe4
- 2.Sg4#
- 2.d4#
- 1...dxe4
- 2.Bd6#
- 2.Rf5#
- 2.c4#
- 1...bxc5
- 2.Rf5#
- 2.Qxb8#
- 1...Qd3
- 2.Bd6#
- 2.Rf5#
- 1...Qc4
- 2.Bd6#
- 1...Qd1
- 2.Bd6#
- 2.Rf5#
- 1...Sd1
- 2.Sg4#
- 2.Bd6#
- 2.d4#
- 1...Sh1
- 2.Sg4#
- 2.Bd6#
- 2.d4#
- 1...Sd3
- 2.Sg4#
- 2.Bd6#
- 1...Sg4
- 2.Sxg4#
- 2.Bd6#
- 2.d4#
- 1...Sc6
- 2.Bd6#
- 2.Rf5#
- 1...d4
- 2.Bd6#
- 2.cxd4#
- 1...Rxf8!
- threat
- 1.Sg3?
- threat
- 2.Bd6#
- 2.Rf5#
- 2.d4#
- 1...Sxe4
- 2.d4#
- 1...dxe4
- 2.Rf5#
- 2.c4#
- 1...bxc5
- 2.Rf5#
- 2.Qxb8#
- 1...Qd3
- 2.Bd6#
- 2.Rf5#
- 1...Qc4
- 2.Bd6#
- 2.Rf5#
- 1...Qd1
- 2.Bd6#
- 2.Rf5#
- 1...Sd1
- 2.Bd6#
- 2.d4#
- 1...Sh1
- 2.Bd6#
- 2.d4#
- 1...Sd3
- 2.Bd6#
- 1...Sg4
- 2.Bd6#
- 2.d4#
- 1...Sc6
- 2.Bd6#
- 2.Rf5#
- 1...d4
- 2.Bd6#
- 2.Rf5#
- 2.cxd4#
- 1...Rxf8!
- threat
- 1.Sd6?
- threat
- 2.Sf7#
- 2.Rf5#
- 2.d4#
- 1...Rxg7
- 2.Rf5#
- 2.d4#
- 1...Sxe4
- 2.Sf7#
- 2.d4#
- 1...dxe4
- 2.Rf5#
- 2.c4#
- 1...bxc5
- 2.Sf7#
- 2.Rf5#
- 1...Qd3
- 2.Sf7#
- 2.Rf5#
- 1...Qc4
- 2.Sf7#
- 2.Rf5#
- 1...Qd1
- 2.Sf7#
- 2.Rf5#
- 1...Sd1
- 2.Sf7#
- 2.d4#
- 1...Sh1
- 2.Sf7#
- 2.d4#
- 1...Sd3
- 2.Sf7#
- 1...Sg4
- 2.Sf7#
- 2.d4#
- 1...Sc6
- 2.Sf7#
- 2.Rf5#
- 1...d4
- 2.Sf7#
- 2.Rf5#
- 2.cxd4#
- 1...Rxf8!
- threat
- 1.Sh6?
- threat
- 2.Sf7#
- 2.Bd6#
- 2.Rf5#
- 2.d4#
- 1...Rxg7
- 2.Bd6#
- 2.Rf5#
- 2.d4#
- 1...Sxe4
- 2.Sg4#
- 2.Sf7#
- 2.d4#
- 1...dxe4
- 2.Rf5#
- 2.c4#
- 1...bxc5
- 2.Sf7#
- 2.Rf5#
- 2.Qxb8#
- 1...Qd3
- 2.Sf7#
- 2.Bd6#
- 2.Rf5#
- 1...Qc4
- 2.Sf7#
- 2.Bd6#
- 1...Qd1
- 2.Sf7#
- 2.Bd6#
- 2.Rf5#
- 1...Sd1
- 2.Sg4#
- 2.Sf7#
- 2.Bd6#
- 2.d4#
- 1...Sh1
- 2.Sg4#
- 2.Sf7#
- 2.Bd6#
- 2.d4#
- 1...Sd3
- 2.Sg4#
- 2.Sf7#
- 2.Bd6#
- 1...Sg4
- 2.Sxg4#
- 2.Sf7#
- 2.Bd6#
- 2.d4#
- 1...Sc6
- 2.Sf7#
- 2.Bd6#
- 2.Rf5#
- 1...d4
- 2.Sf7#
- 2.Bd6#
- 2.cxd4#
- 1...Rxf8!
- threat
- 1.Qxb6?
- threat
- 2.Sg6#
- 2.Qc7#
- 2.Qd6#
- 2.Qe6#
- 2.Qxb8#
- 1...Rxg7
- 2.Qc7#
- 2.Qd6#
- 2.Qe6#
- 2.Qxb8#
- 1...Rxf8
- 2.Qd6#
- 1...Sxe4
- 2.Sg6#
- 2.Qe6#
- 2.d4#
- 1...dxe4
- 2.Qd6#
- 2.Qe6#
- 1...Qc4
- 2.Qe6#
- 1...d4
- 2.Qe6#
- 1...Qg2
- 2.Qc7#
- 2.Qd6#
- 2.Qe6#
- 2.Qxb8#
- 1...Qb5
- 2.Sg6#
- 2.Qc7#
- 2.Qd6#
- 2.Qe6#
- 1...Qa6
- 2.Sg6#
- 1...Qb1
- 2.Sg6#
- 2.Qc7#
- 2.Qd6#
- 2.Qe6#
- 1...Qg1
- 2.Qc7#
- 2.Qd6#
- 2.Qe6#
- 2.Qxb8#
- 1...Sa6
- 2.Sg6#
- 2.Sd7#
- 2.Qd6#
- 2.Qe6#
- 1...Sc6
- 2.Qc7#
- 1...Sd7
- 2.Sg6#
- 2.Sxd7#
- 2.Qc7#
- 2.Qd6#
- 2.Qe6#
- 1...axb6!
- threat
- 1.c4+?
- 1...d4
- 2.Qxd4#
- 1...Kxe4!
- 1...d4
- 1.Se3?
- Keys
- 1.Sd4!
- threat
- 2.Bd6#
- 1...Sxe4
- 2.Sg6#
- 1...dxe4
- 2.Rf5#
- 1...bxc5
- 2.Qxb8#
- threat
- 1.Sd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- S(b);SBLOCK,XP(F)::P(B)
- P(d);N_GUARD,SBLOCK,XP(F)::QAB(A)+P(C)
- P(f);OGATE,XP(H)::QAB(A),XS(h)
- Tries
- Try
- S(I);
- Threat
- DUALS(3)
- Vars
- Q(a);P_PINP(F)::B(K)
- Refutation
- R(i);XS(N)
- Try
- S(I);
- Threat
- DUALS(3)
- Vars
- S(b);XP(F)::P(B)
- S(b);::B(K)
- Refutation
- R(i);XS(N)
- Try
- S(I);
- Threat
- DUALS(3)
- Vars
- S(b);::S(I)
- Refutation
- R(i);XS(N)
- Try
- S(I);
- Threat
- DUALS(4)
- Refutation
- R(i);XS(N)
- Try
- Q(A);XP(f)
- Threat
- DUALS(5)
- Vars
- R(i);XS(N)::QAB1(A)
- Q(a);P_PINP(F)::QAR1(A)
- P(d);::QAR1(A)
- Q(a);::S(N)
- S(h);::QAB(A)
- Refutation
- P(g);XQ(A)
- Try
- P(C);CHECK
- Vars
- P(d);P_SPINP(d)::QAB1(A),XP(d)
- Refutation
- K(e);P-FLIGHT,XP(F)
- Try
- Actual
- S(I);
- Threat
- B(K)
- Vars
- S(b);SBLOCK,XP(F)::S(N)
- P(d);SBLOCK,XP(F)::R1(D)
- P(f);OGATE,XP(H)::QAB(A),XS(h)
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).