MESON Chess Problem Database
Problem Display
PID: 71094 (8/B2Q4/4PK2/1PqPrP2/2pk2p1/R3N3/1p1P4/1BbRN3 w - - 0 1)
Seilberger, Johann Joseph Petrus Adrianus
Match: East Netherlands - West Netherlands, 1944
#2
13 + 7
SOLUTION
- SOUND
- Sets
- 1...Qb6
- 2.Bxb6#
- 1...Qxa7
- 2.Qxa7#
- 1...Rxe3
- 2.dxe3#
- 1...Re4
- 2.S1c2#
- 2.S3c2#
- 1...Rxd5
- 2.Qxd5#
- 1...Rxf5+
- 2.Sxf5#
- 1...Rxe6+
- 2.dxe6#
- 1...Bxd2
- 2.Rxd2#
- 1...c3
- 2.Ra4#
- 1...g3
- 2.Sf3#
- 1...Qb6
- Tries
- 1.S1g2?
- 1...Rxf5+
- 2.Sxf5#
- 1...Rxe6+
- 2.dxe6#
- 1...Qxa7
- 2.Qxa7#
- 1...Rxe3
- 2.dxe3#
- 1...Rxd5
- 2.Qxd5#
- 1...Bxd2
- 2.Rxd2#
- 1...Qb6
- 2.Bxb6#
- 1...Re4
- 2.Sc2#
- 1...c3
- 2.Ra4#
- 2.dxc3#
- 1...g3!
- 1...Rxf5+
- 1.Bb6?
- 1...Rxf5+
- 2.Sxf5#
- 1...Rxe6+
- 2.dxe6#
- 1...Rxe3
- 2.dxe3#
- 1...Rxd5
- 2.Qxd5#
- 1...Bxd2
- 2.Rxd2#
- 1...Re4
- 2.S1c2#
- 2.S3c2#
- 1...c3
- 2.Ra4#
- 1...g3
- 2.Sf3#
- 1...Qxb6!
- 1...Rxf5+
- 1.Rb3?
- 1...Rxf5+
- 2.Sxf5#
- 1...Rxe6+
- 2.dxe6#
- 1...Qxa7
- 2.Qxa7#
- 1...Rxe3
- 2.dxe3#
- 1...Rxd5
- 2.Qxd5#
- 1...Bxd2
- 2.Rxd2#
- 1...Qb6
- 2.Bxb6#
- 1...Re4
- 2.S1c2#
- 2.S3c2#
- 1...c3
- 2.Rb4#
- 1...g3
- 2.Sf3#
- 1...cxb3!
- 1...Rxf5+
- 1.Qc6?
- threat
- 2.Bxc5#
- 2.Qxc5#
- 1...Rxf5+
- 2.Sxf5#
- 1...Qxa7
- 2.Qxc4#
- 1...Rxd5
- 2.Qxd5#
- 1...Qb6
- 2.Bxb6#
- 2.Qxc4#
- 2.Qxb6#
- 1...Rxe6+!
- threat
- 1.Qd6?
- threat
- 2.Bxc5#
- 2.Qxc5#
- 2.Qxe5#
- 1...Rxf5+
- 2.Sxf5#
- 1...Rxe6+
- 2.dxe6#
- 1...Rxe3
- 2.Bxc5#
- 2.Qxc5#
- 2.dxe3#
- 1...Rxd5
- 2.Bxc5#
- 2.Qf4#
- 2.Qxd5#
- 1...Qb6
- 2.Bxb6#
- 2.Qxb6#
- 1...Re4
- 2.S1c2#
- 2.S3c2#
- 2.Bxc5#
- 2.Qxc5#
- 1...Qxa7!
- threat
- 1.Qb7?
- 1...Rxf5+
- 2.Sxf5#
- 1...Qxa7
- 2.Qxa7#
- 1...Rxe3
- 2.dxe3#
- 1...Rxd5
- 2.Qxd5#
- 1...Bxd2
- 2.Rxd2#
- 1...Qb6
- 2.Bxb6#
- 2.Qxb6#
- 1...Re4
- 2.S1c2#
- 2.S3c2#
- 1...c3
- 2.Ra4#
- 1...g3
- 2.Sf3#
- 1...Rxe6+!
- 1...Rxf5+
- 1.Qd8?
- 1...Rxf5+
- 2.Sxf5#
- 1...Rxe6+
- 2.dxe6#
- 1...Rxe3
- 2.dxe3#
- 1...Rxd5
- 2.Qxd5#
- 1...Bxd2
- 2.Rxd2#
- 1...Qb6
- 2.Bxb6#
- 2.Qxb6#
- 1...Re4
- 2.S1c2#
- 2.S3c2#
- 1...c3
- 2.Ra4#
- 1...g3
- 2.Sf3#
- 1...Qxa7!
- 1...Rxf5+
- 1.e7?
- 1...Qb6+
- 2.Bxb6#
- 1...Rxf5+
- 2.Sxf5#
- 1...Re6+
- 2.dxe6#
- 1...Qxa7
- 2.Qxa7#
- 1...Rxe3
- 2.dxe3#
- 1...Rxd5
- 2.Qxd5#
- 1...Bxd2
- 2.Rxd2#
- 1...Re4
- 2.S1c2#
- 2.S3c2#
- 1...c3
- 2.Ra4#
- 1...g3
- 2.Sf3#
- 1...Rxe7!
- 1...Qb6+
- 1.S1g2?
- Keys
- 1.Qg7!
- 1...Rxf5+
- 2.Kxf5#
- 1...Rxe6+
- 2.Kxe6#
- 1...Qxa7
- 2.Qxa7#
- 1...Rxe3
- 2.dxe3#
- 1...Rxd5
- 2.Qxg4#
- 1...Bxd2
- 2.Rxd2#
- 1...Qb6
- 2.Bxb6#
- 1...Re4
- 2.S1c2#
- 1...c3
- 2.Ra4#
- 1...g3
- 2.Sf3#
- 1...Rxf5+
- 1.Qg7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(f);OGATEB,P_PINP(J)::B(L),XQ(f)
- Q(f);N_SPINQ(f),OGATE,XB(L)::QAB(M),XQ(f)
- R(g);OGATE,XS(F)::R(B)+P(D)DCHECK,XR(g)
- R(g);OGATE,P_SPINR(g),XP(H)::QAR1(M),XR(g)
- R(g);CHECK,XP(I)::S(F),XR(g)
- R(g);CHECK,OGATE,XP(J)::QAR(M)+P(H),XR(g)
- B(a);OGATE,P_SPINB(a),XP(D)::R(B),XB(a)
- P(c);OGATEB::R(E)
- P(e);N_GUARD::S(C)
- Tries
- Try
- S(C);
- Vars
- R(g);CHECK,XP(I)::S(F),XR(g)
- R(g);CHECK,OGATE,XP(J)::QAR(M)+P(H),XR(g)
- Q(f);N_SPINQ(f),OGATE,XB(L)::QAB(M),XQ(f)
- R(g);OGATE,XS(F)::R(B)+P(D)DCHECK,XR(g)
- R(g);OGATE,P_SPINR(g),XP(H)::QAR1(M),XR(g)
- B(a);OGATE,P_SPINB(a),XP(D)::R(B),XB(a)
- Q(f);OGATEB,P_PINP(J)::B(L),XQ(f)
- R(g);SBLOCK::S(F)
- Refutation
- P(e);
- Try
- B(L);
- Vars
- R(g);CHECK,XP(I)::S(F),XR(g)
- R(g);CHECK,OGATE,XP(J)::QAR(M)+P(H),XR(g)
- R(g);OGATE,XS(F)::R(B)+P(D)DCHECK,XR(g)
- R(g);OGATE,P_SPINR(g),XP(H)::QAR1(M),XR(g)
- B(a);OGATE,P_SPINB(a),XP(D)::R(B),XB(a)
- P(c);OGATEB::R(E)
- P(e);N_GUARD::S(C)
- Refutation
- Q(f);N_SPINQ(f),P_PINP(J),XB(L)
- Try
- R(E);
- Vars
- R(g);CHECK,XP(I)::S(F),XR(g)
- R(g);CHECK,OGATE,XP(J)::QAR(M)+P(H),XR(g)
- Q(f);N_SPINQ(f),OGATE,XB(L)::QAB(M),XQ(f)
- R(g);OGATE,XS(F)::R(B)+P(D)DCHECK,XR(g)
- R(g);OGATE,P_SPINR(g),XP(H)::QAR1(M),XR(g)
- B(a);OGATE,P_SPINB(a),XP(D)::R(B),XB(a)
- Q(f);OGATEB,P_PINP(J)::B(L),XQ(f)
- P(c);OGATEB::R(E)
- P(e);N_GUARD::S(C)
- Refutation
- P(c);XR(E)
- Try
- Q(M);
- Threat
- DUALS(2)
- Vars
- R(g);CHECK,XP(I)::S(F),XR(g)
- Q(f);N_SPINQ(f),OGATE,XB(L)::QAR1(M),XP(c)
- R(g);OGATE,XP(H)::QAR1(M),XR(g)
- Refutation
- R(g);CHECK,XP(J)
- Try
- Q(M);
- Threat
- DUALS(3)
- Vars
- R(g);CHECK,XP(I)::S(F),XR(g)
- R(g);CHECK,OGATE,XP(J)::QAR(M)+P(H),XR(g)
- Refutation
- Q(f);N_SPINQ(f),XB(L)
- Try
- Q(M);
- Vars
- R(g);CHECK,XP(I)::S(F),XR(g)
- Q(f);N_SPINQ(f),OGATE,XB(L)::QAB(M),XQ(f)
- R(g);OGATE,XS(F)::R(B)+P(D)DCHECK,XR(g)
- R(g);OGATE,XP(H)::QAR1(M),XR(g)
- B(a);OGATE,P_SPINB(a),XP(D)::R(B),XB(a)
- P(c);OGATEB::R(E)
- P(e);N_GUARD::S(C)
- Refutation
- R(g);CHECK,XP(J)
- Try
- Q(M);
- Vars
- R(g);CHECK,XP(I)::S(F),XR(g)
- R(g);CHECK,OGATE,XP(J)::QAR(M)+P(H),XR(g)
- R(g);OGATE,XS(F)::R(B)+P(D)DCHECK,XR(g)
- R(g);OGATE,P_SPINR(g),XP(H)::QAR1(M),XR(g)
- B(a);OGATE,P_SPINB(a),XP(D)::R(B),XB(a)
- P(c);OGATEB::R(E)
- P(e);N_GUARD::S(C)
- Refutation
- Q(f);N_SPINQ(f),XB(L)
- Try
- P(J);
- Vars
- Q(f);CHECK,OGATEB::B(L),XQ(f)
- R(g);CHECK,XP(I)::S(F),XR(g)
- R(g);CHECK,OGATE::QAR(M)+P(H),XR(g)
- Q(f);N_SPINQ(f),OGATE,XB(L)::QAB(M),XQ(f)
- R(g);OGATE,XS(F)::R(B)+P(D)DCHECK,XR(g)
- R(g);OGATE,P_SPINR(g),XP(H)::QAR1(M),XR(g)
- B(a);OGATE,P_SPINB(a),XP(D)::R(B),XB(a)
- P(c);OGATEB::R(E)
- P(e);N_GUARD::S(C)
- Refutation
- R(g);XP(J)
- Try
- Actual
- Q(M);
- Vars
- R(g);CHECK,XP(I)::QAB(M)+K(K),XR(g)
- R(g);CHECK,XP(J)::QAB(M)+K(K),XR(g)
- Q(f);N_SPINQ(f),OGATE,XB(L)::QAB(M),XQ(f)
- R(g);OGATE,XS(F)::R(B)+P(D)DCHECK,XR(g)
- R(g);N_GUARD,XP(H)::QAR(M),XP(e)
- B(a);OGATE,P_SPINB(a),XP(D)::R(B),XB(a)
- Q(f);OGATEB,P_PINP(J)::B(L),XQ(f)
- R(g);SBLOCK::S(C)
- P(c);OGATEB::R(E)
- P(e);N_GUARD::S(C)
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).