MESON Chess Problem Database
Problem Display
PID: 106927 (KB1N4/PB2pp2/3qNP1p/4k2n/8/3b1Q2/3P4/8 w - - 0 1)
Knoppel, Jan Heribert
Source?, 1959
#2
9 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qc7
- 2.Bxc7#
- 1...Qxb8+
- 2.axb8Q#
- 2.axb8B#
- 1...Bb1
- 2.d4#
- 1...Bf1
- 2.d4#
- 1...Bc2
- 2.d4#
- 1...Be2
- 2.d4#
- 1...Bc4
- 2.d4#
- 1...Be4
- 2.d4#
- 1...Bb5
- 2.d4#
- 1...Bf5
- 2.Qc3#
- 1...Ba6
- 2.d4#
- 1...Bg6
- 2.d4#
- 1...Bh7
- 2.d4#
- 1...Sg3
- 2.Qf4#
- 1...Sf4
- 2.Qxf4#
- 1...Sxf6
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...exf6
- 2.Qd5#
- 1...fxe6
- 2.Sc6#
- 1...Qc7
- Tries
- 1.Be4?
- threat
- 2.Qf5#
- 1...Qxb8+
- 2.axb8Q#
- 2.axb8B#
- 1...fxe6
- 2.Sc6#
- 1...Qc7
- 2.Bxc7#
- 1...Sf4
- 2.Qxf4#
- 1...Sg3
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...Bxe4+!
- threat
- 1.Bc6?
- 1...Qxb8+
- 2.axb8Q#
- 2.axb8B#
- 1...Sxf6
- 2.Qf4#
- 1...exf6
- 2.Qd5#
- 1...Qc7
- 2.Bxc7#
- 1...Bf5
- 2.Qc3#
- 1...Sf4
- 2.Qxf4#
- 1...Bb1
- 2.d4#
- 1...Bf1
- 2.d4#
- 1...Bc2
- 2.d4#
- 1...Be2
- 2.d4#
- 1...Bc4
- 2.d4#
- 1...Be4
- 2.d4#
- 1...Bb5
- 2.d4#
- 1...Ba6
- 2.d4#
- 1...Bg6
- 2.d4#
- 1...Bh7
- 2.d4#
- 1...Sg3
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...fxe6!
- 1...Qxb8+
- 1.Bxd6+?
- 1...Kxd6
- 2.Qd5#
- 1...exd6!
- 1...Kxd6
- 1.Bc7?
- 1...Sxf6
- 2.Qf4#
- 1...exf6
- 2.Qd5#
- 1...fxe6
- 2.Sc6#
- 1...Bf5
- 2.Qc3#
- 1...Sf4
- 2.Qxf4#
- 1...Bb1
- 2.d4#
- 1...Bf1
- 2.d4#
- 1...Bc2
- 2.d4#
- 1...Be2
- 2.d4#
- 1...Bc4
- 2.d4#
- 1...Be4
- 2.d4#
- 1...Bb5
- 2.d4#
- 1...Ba6
- 2.d4#
- 1...Bg6
- 2.d4#
- 1...Bh7
- 2.d4#
- 1...Sg3
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...Qxc7!
- 1...Sxf6
- 1.fxe7?
- 1...Qxb8+
- 2.axb8Q#
- 2.axb8B#
- 1...fxe6
- 2.Sc6#
- 1...Qc7
- 2.Bxc7#
- 1...Bf5
- 2.Qc3#
- 1...Sf4
- 2.Qxf4#
- 1...Bb1
- 2.d4#
- 1...Bf1
- 2.d4#
- 1...Bc2
- 2.d4#
- 1...Be2
- 2.d4#
- 1...Bc4
- 2.d4#
- 1...Be4
- 2.d4#
- 1...Bb5
- 2.d4#
- 1...Ba6
- 2.d4#
- 1...Bg6
- 2.d4#
- 1...Bh7
- 2.d4#
- 1...Sg3
- 2.Qf4#
- 1...Sf6
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...f6
- 2.Qd5#
- 1...f5!
- 1...Qxb8+
- 1.Be4?
- Keys
- 1.Qf2!
- 1...Qxb8+
- 2.axb8Q#
- 2.axb8B#
- 1...Sxf6
- 2.Qf4#
- 1...exf6
- 2.Qc5#
- 1...fxe6
- 2.Sf7#
- 1...Qc7
- 2.Bxc7#
- 1...Bf5
- 2.Qd4#
- 1...Sf4
- 2.Qxf4#
- 1...Bb1
- 2.d4#
- 1...Bf1
- 2.d4#
- 1...Bc2
- 2.d4#
- 1...Be2
- 2.d4#
- 1...Bc4
- 2.d4#
- 1...Be4
- 2.d4#
- 1...Bb5
- 2.d4#
- 1...Ba6
- 2.d4#
- 1...Bg6
- 2.d4#
- 1...Bh7
- 2.d4#
- 1...Sg3
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...Qxb8+
- 1.Qf2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(d);OGATEB::B(H),XQ(d)
- Q(d);CHECK,N_SPINQ(d),OGATE,XB(H)::PXQ(d)=Q
- B(a);OGATE::P(A)
- B(a);OGATE,P_PINB(F)::P(A)
- B(a);OGATE,SBLOCK::QAB(B)
- S(c);N_GUARD::QAB1(B)
- S(c);N_GUARD::QAB1(B),XS(c)
- S(c);N_GUARD,XP(D)::QAB1(B)
- P(f);SBLOCK,XP(D)::QAR1(B)
- P(g);SBLOCK,XS(C)::S(I)
- Tries
- Try
- B(F);
- Threat
- QAR1(B)
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XB(H)::PXQ(d)=Q
- P(g);SBLOCK,XS(C)::S(I)
- Q(d);OGATEB::B(H),XQ(d)
- S(c);N_GUARD::QAB1(B),XS(c)
- S(c);N_GUARD::QAB1(B)
- Refutation
- B(a);CHECK,XB(F)
- Try
- B(F);
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XB(H)::PXQ(d)=Q
- S(c);N_GUARD,XP(D)::QAB1(B)
- P(f);SBLOCK,XP(D)::QAR1(B)
- Q(d);OGATEB::B(H),XQ(d)
- B(a);OGATE,SBLOCK::QAB(B)
- S(c);N_GUARD::QAB1(B),XS(c)
- B(a);OGATE::P(A)
- B(a);OGATE,P_PINB(F)::P(A)
- S(c);N_GUARD::QAB1(B)
- Refutation
- P(g);XS(C)
- Try
- B(H);CHECK,XQ(d)
- Vars
- K(b);S_FLIGHT,XB(H)::QAR1(B)
- Refutation
- P(f);XB(H)
- Try
- B(H);
- Vars
- S(c);N_GUARD,XP(D)::QAB1(B)
- P(f);SBLOCK,XP(D)::QAR1(B)
- P(g);SBLOCK,XS(C)::S(I)
- B(a);OGATE,SBLOCK::QAB(B)
- S(c);N_GUARD::QAB1(B),XS(c)
- B(a);OGATE::P(A)
- B(a);OGATE,P_PINB(F)::P(A)
- S(c);N_GUARD::QAB1(B)
- Refutation
- Q(d);N_SPINQ(d),XB(H)
- Try
- P(D);XP(f)
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XB(H)::PXQ(d)=Q
- P(g);SBLOCK,XS(C)::S(I)
- Q(d);OGATEB::B(H),XQ(d)
- B(a);OGATE,SBLOCK::QAB(B)
- S(c);N_GUARD::QAB1(B),XS(c)
- B(a);OGATE::P(A)
- B(a);OGATE,P_PINB(F)::P(A)
- S(c);N_GUARD::QAB1(B)
- P(g);SBLOCK::QAR1(B)
- Refutation
- P(g);
- Try
- Actual
- Q(B);
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XB(H)::PXQ(d)=Q
- S(c);N_GUARD,XP(D)::QAB1(B)
- P(f);SBLOCK,XP(D)::QAR2(B)
- P(g);SBLOCK,XS(C)::S(I)
- Q(d);OGATEB::B(H),XQ(d)
- B(a);SBLOCK::QAB1(B)
- S(c);N_GUARD::QAB1(B),XS(c)
- B(a);OGATE::P(A)
- B(a);OGATE,P_PINB(F)::P(A)
- S(c);N_GUARD::QAB1(B)
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).