MESON Chess Problem Database
Problem Display
PID: 21514 (6R1/4QK1n/2PNB3/1P1qk3/R2N1p2/1P3p2/5P2/8 w - - 0 1)
Lindmark, CE
2nd Prize, Good Companions (March), 1919
#2
11 + 5
| 3132 | The Good Companion Two-Mover | 1922 |
| 1099 | WCSC | 1992 |
| 5396 | World Chess Solving Championship 1977-1996 | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Qxb3
- 2.Bxb3#
- 1...Qc4
- 2.Sxf3#
- 1...Qxc6
- 2.Sxc6#
- 1...Qxe6+
- 2.Qxe6#
- 1...Qxd4
- 2.Bc4#
- 1...Qxb5
- 2.Sxf3#
- 1...Qc5
- 2.Sxf3#
- 1...Qxd6
- 2.Sxf3#
- 1...Sg5+
- 2.Rxg5#
- 1...Sf6
- 2.Rg5#
- 1...Sf8
- 2.Rg5#
- 1...Qxb3
- Tries
- 1.Ke8?
- 1...Qxc6+
- 2.Sxc6#
- 1...Qxb3
- 2.Bxb3#
- 1...Qxe6
- 2.Qxe6#
- 1...Qxd4
- 2.Bc4#
- 2.Bf7#
- 1...Qxb5
- 2.Sxf3#
- 2.Bf7#
- 1...Qxd6
- 2.Sxf3#
- 1...Qc4
- 2.Sxf3#
- 1...Qe4
- 2.Sf7#
- 2.Bf7#
- 1...Qc5
- 2.Sxf3#
- 2.Bf7#
- 1...Sg5
- 2.Rxg5#
- 1...Sf8
- 2.Rg5#
- 1...Sf6+!
- 1...Qxc6+
- 1.Sc2?
- 1...Qxe6+
- 2.Qxe6#
- 1...Sg5+
- 2.Rxg5#
- 1...Qxb3
- 2.Bxb3#
- 2.Bc4#
- 2.Re4#
- 1...Qxc6
- 2.Bc4#
- 1...Qxb5
- 2.Bc4#
- 2.Re4#
- 1...Qc4
- 2.Bxc4#
- 1...Qe4
- 2.Bc4#
- 2.Rxe4#
- 1...Qd1
- 2.Bc4#
- 2.Re4#
- 1...Qd2
- 2.Bc4#
- 2.Re4#
- 1...Qd3
- 2.Bc4#
- 1...Qd4
- 2.Bc4#
- 1...Qc5
- 2.Bc4#
- 2.Re4#
- 1...Sf6
- 2.Rg5#
- 1...Sf8
- 2.Rg5#
- 1...Qxd6!
- 1...Qxe6+
- 1.S4f5?
- 1...Qxe6+
- 2.Qxe6#
- 1...Qxb3
- 2.Bxb3#
- 2.Bc4#
- 2.Re4#
- 1...Qxc6
- 2.Bc4#
- 1...Qxb5
- 2.Bc4#
- 2.Re4#
- 1...Qxd6
- 2.Qxd6#
- 1...Qc4
- 2.Bxc4#
- 1...Qe4
- 2.Bc4#
- 2.Rxe4#
- 1...Qd1
- 2.Bc4#
- 2.Re4#
- 1...Qd2
- 2.Bc4#
- 2.Re4#
- 1...Qd3
- 2.Bc4#
- 1...Qd4
- 2.Bc4#
- 1...Qc5
- 2.Bc4#
- 2.Re4#
- 1...Sf6
- 2.Qxf6#
- 1...Sf8
- 2.Qf6#
- 1...Sg5+!
- 1...Qxe6+
- 1.Rb4?
- 1...Qxe6+
- 2.Qxe6#
- 1...Sg5+
- 2.Rxg5#
- 1...Qxb3
- 2.Bxb3#
- 1...Qxc6
- 2.Sxc6#
- 1...Qxd4
- 2.Bc4#
- 1...Qxb5
- 2.Sxf3#
- 1...Qxd6
- 2.Sxf3#
- 1...Qc4
- 2.Sxf3#
- 1...Qc5
- 2.Sxf3#
- 1...Sf6
- 2.Rg5#
- 1...Sf8
- 2.Rg5#
- 1...Qe4!
- 1...Qxe6+
- 1.Rg1?
- 1...Qxe6+
- 2.Qxe6#
- 1...Sg5+
- 2.Rxg5#
- 1...Qxb3
- 2.Bxb3#
- 1...Qxc6
- 2.Sxc6#
- 1...Qxd4
- 2.Bc4#
- 1...Qxb5
- 2.Sxf3#
- 1...Qxd6
- 2.Sxf3#
- 2.Re1#
- 1...Qc4
- 2.Sxf3#
- 1...Qc5
- 2.Sxf3#
- 2.Re1#
- 1...Sf6
- 2.Rg5#
- 1...Sf8
- 2.Rg5#
- 1...Qe4!
- 1...Qxe6+
- 1.Rg4?
- 1...Qxe6+
- 2.Qxe6#
- 1...Sg5+
- 2.Rxg5#
- 1...Qxb3
- 2.Bxb3#
- 1...Qxc6
- 2.Sxc6#
- 1...Qxd4
- 2.Bc4#
- 1...Qxb5
- 2.Sxf3#
- 1...Qxd6
- 2.Sxf3#
- 1...Qc4
- 2.Sxf3#
- 1...Qc5
- 2.Sxf3#
- 1...Sf6
- 2.Rg5#
- 1...Sf8
- 2.Rg5#
- 1...Qe4!
- 1...Qxe6+
- 1.Rg6?
- 1...Qxe6+
- 2.Qxe6#
- 1...Sg5+
- 2.Rxg5#
- 1...Qxb3
- 2.Bxb3#
- 1...Qxc6
- 2.Sxc6#
- 1...Qxd4
- 2.Bc4#
- 1...Qxb5
- 2.Sxf3#
- 1...Qxd6
- 2.Sxf3#
- 1...Qc4
- 2.Sxf3#
- 1...Qc5
- 2.Sxf3#
- 1...Sf6
- 2.Rg5#
- 1...Sf8
- 2.Rg5#
- 1...Qe4!
- 1...Qxe6+
- 1.Rg7?
- 1...Qxe6+
- 2.Qxe6#
- 1...Sg5+
- 2.Rxg5#
- 1...Qxb3
- 2.Bxb3#
- 1...Qxc6
- 2.Sxc6#
- 1...Qxd4
- 2.Bc4#
- 1...Qxb5
- 2.Sxf3#
- 1...Qxd6
- 2.Sxf3#
- 1...Qc4
- 2.Sxf3#
- 1...Qc5
- 2.Sxf3#
- 1...Sf6
- 2.Rg5#
- 1...Sf8
- 2.Rg5#
- 1...Qe4!
- 1...Qxe6+
- 1.b6?
- 1...Qxe6+
- 2.Qxe6#
- 1...Sg5+
- 2.Rxg5#
- 1...Qxb3
- 2.Bxb3#
- 1...Qxc6
- 2.Sxc6#
- 1...Qxd4
- 2.Bc4#
- 1...Qxd6
- 2.Sxf3#
- 1...Qc4
- 2.Sxf3#
- 1...Qa5
- 2.Sxf3#
- 1...Qb5
- 2.Sxf3#
- 1...Qc5
- 2.Sxf3#
- 1...Sf6
- 2.Rg5#
- 1...Sf8
- 2.Rg5#
- 1...Qe4!
- 1...Qxe6+
- 1.Ke8?
- Keys
- 1.Rd8!
- 1...Qxe6+
- 2.Qxe6#
- 1...Sg5+
- 2.Qxg5#
- 1...Qxb3
- 2.Bxb3#
- 1...Qxc6
- 2.Sxc6#
- 1...Qxd4
- 2.Bc4#
- 1...Qxb5
- 2.Sxf3#
- 1...Qxd6
- 2.Sxf3#
- 1...Qc4
- 2.Sxf3#
- 1...Qe4
- 2.Sc4#
- 1...Qc5
- 2.Sxf3#
- 1...Sf6
- 2.Qxf6#
- 1...Sf8
- 2.Qg5#
- 2.Qf6#
- 1...Qxe6+
- 1.Rd8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- Q(c);XP(B)::QAR(I)+B(H),XQ(c)
- Q(c);N_GUARD::S(D),XP(a)
- Q(c);N_PINB(H),XP(F)::S(D),XQ(c)
- Q(c);CHECK,OGATE,P_SPINQ(c),XB(H)::QAR1(I),XQ(c)
- Q(c);N_PINB(H),SBLOCK,XS(D)::QAR(I)+B(H)
- Q(c);N_GUARD,N_PINB(H),XP(E)::S(D),XP(a)
- Q(c);N_GUARD,N_PINB(H)::S(D),XP(a)
- Q(c);N_GUARD,N_PINB(H),XS(G)::S(D),XP(a)
- S(e);CHECK,N_GUARD::R(K),XS(e)
- S(e);N_GUARD::R(K)
- Tries
- Try
- K(J);N_SPINB(H),S_FLIGHT
- Vars
- Q(c);CHECK,XP(F)::S(D),XQ(c)
- Q(c);OGATE,XP(B)::QAR(I)+B(H),XQ(c)
- Q(c);OGATE,P_PINQ(I),P_SPINQ(c),XB(H)::QAR1(I),XQ(c)
- Q(c);N_GUARD,XS(G)::S(D),XP(a)
- Q(c);N_GUARD::S(D),XP(a)
- S(e);N_GUARD::R(K),XS(e)
- S(e);N_GUARD::R(K)
- Refutation
- S(e);CHECK
- Try
- S(D);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XB(H)::QAR1(I),XQ(c)
- S(e);CHECK,N_GUARD::R(K),XS(e)
- Q(c);N_PINB(H),XP(F)::QAR(I)+B(H)
- Q(c);::QAR(I)+B(H),XQ(c)
- Q(c);N_PINB(H)::QAR(I)+B(H)
- S(e);N_GUARD::R(K)
- Refutation
- Q(c);N_PINB(H),XS(G)
- Try
- S(D);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XB(H)::QAR1(I),XQ(c)
- Q(c);N_PINB(H),XP(F)::QAR(I)+B(H)
- Q(c);N_PINB(H),OGATE,XS(G)::QAB1(I),XQ(c)
- Q(c);::QAR(I)+B(H),XQ(c)
- Q(c);N_PINB(H)::QAR(I)+B(H)
- S(e);N_GUARD::QAB1(I),XS(e)
- S(e);N_GUARD::QAB1(I)
- Refutation
- S(e);CHECK
- Try
- R(C);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XB(H)::QAR1(I),XQ(c)
- S(e);CHECK,N_GUARD::R(K),XS(e)
- Q(c);XP(B)::QAR(I)+B(H),XQ(c)
- Q(c);N_PINB(H),XP(F)::S(D),XQ(c)
- Q(c);N_PINB(H),SBLOCK,XS(D)::QAR(I)+B(H)
- Q(c);N_GUARD,N_PINB(H),XP(E)::S(D),XP(a)
- Q(c);N_GUARD,N_PINB(H),XS(G)::S(D),XP(a)
- Q(c);N_GUARD::S(D),XP(a)
- Q(c);N_GUARD,N_PINB(H)::S(D),XP(a)
- S(e);N_GUARD::R(K)
- Refutation
- Q(c);N_PINB(H)
- Try
- R(K);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XB(H)::QAR1(I),XQ(c)
- S(e);CHECK,N_GUARD::R(K),XS(e)
- Q(c);XP(B)::QAR(I)+B(H),XQ(c)
- Q(c);N_PINB(H),XP(F)::S(D),XQ(c)
- Q(c);N_PINB(H),SBLOCK,XS(D)::QAR(I)+B(H)
- Q(c);N_GUARD,N_PINB(H),XP(E)::S(D),XP(a)
- Q(c);N_GUARD::S(D),XP(a)
- S(e);N_GUARD::R(K)
- Refutation
- Q(c);N_PINB(H)
- Try
- R(K);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XB(H)::QAR1(I),XQ(c)
- S(e);CHECK,N_GUARD::R(K),XS(e)
- Q(c);XP(B)::QAR(I)+B(H),XQ(c)
- Q(c);N_PINB(H),XP(F)::S(D),XQ(c)
- Q(c);N_PINB(H),SBLOCK,XS(D)::QAR(I)+B(H)
- Q(c);N_GUARD,N_PINB(H),XP(E)::S(D),XP(a)
- Q(c);N_GUARD,N_PINB(H),XS(G)::S(D),XP(a)
- Q(c);N_GUARD::S(D),XP(a)
- Q(c);N_GUARD,N_PINB(H)::S(D),XP(a)
- S(e);N_GUARD::R(K)
- Refutation
- Q(c);N_PINB(H)
- Try
- R(K);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XB(H)::QAR1(I),XQ(c)
- S(e);CHECK,N_GUARD::R(K),XS(e)
- Q(c);XP(B)::QAR(I)+B(H),XQ(c)
- Q(c);N_PINB(H),XP(F)::S(D),XQ(c)
- Q(c);N_PINB(H),SBLOCK,XS(D)::QAR(I)+B(H)
- Q(c);N_GUARD,N_PINB(H),XP(E)::S(D),XP(a)
- Q(c);N_GUARD,N_PINB(H),XS(G)::S(D),XP(a)
- Q(c);N_GUARD::S(D),XP(a)
- Q(c);N_GUARD,N_PINB(H)::S(D),XP(a)
- S(e);N_GUARD::R(K)
- Refutation
- Q(c);N_PINB(H)
- Try
- R(K);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XB(H)::QAR1(I),XQ(c)
- S(e);CHECK,N_GUARD::R(K),XS(e)
- Q(c);XP(B)::QAR(I)+B(H),XQ(c)
- Q(c);N_PINB(H),XP(F)::S(D),XQ(c)
- Q(c);N_PINB(H),SBLOCK,XS(D)::QAR(I)+B(H)
- Q(c);N_GUARD,N_PINB(H),XP(E)::S(D),XP(a)
- Q(c);N_GUARD,N_PINB(H),XS(G)::S(D),XP(a)
- Q(c);N_GUARD::S(D),XP(a)
- Q(c);N_GUARD,N_PINB(H)::S(D),XP(a)
- S(e);N_GUARD::R(K)
- Refutation
- Q(c);N_PINB(H)
- Try
- P(E);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XB(H)::QAR1(I),XQ(c)
- S(e);CHECK,N_GUARD::R(K),XS(e)
- Q(c);XP(B)::QAR(I)+B(H),XQ(c)
- Q(c);N_PINB(H),XP(F)::S(D),XQ(c)
- Q(c);N_PINB(H),SBLOCK,XS(D)::QAR(I)+B(H)
- Q(c);N_GUARD,N_PINB(H),XS(G)::S(D),XP(a)
- Q(c);N_GUARD::S(D),XP(a)
- Q(c);N_GUARD,N_PINB(H)::S(D),XP(a)
- S(e);N_GUARD::R(K)
- Refutation
- Q(c);N_PINB(H)
- Try
- Actual
- R(K);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XB(H)::QAR1(I),XQ(c)
- S(e);CHECK,N_GUARD::QAR2(I),XS(e)
- Q(c);XP(B)::QAR(I)+B(H),XQ(c)
- Q(c);N_PINB(H),XP(F)::S(D),XQ(c)
- Q(c);N_PINB(H),SBLOCK,XS(D)::QAR(I)+B(H)
- Q(c);N_GUARD,N_PINB(H),XP(E)::S(D),XP(a)
- Q(c);N_GUARD,N_PINB(H),XS(G)::S(D),XP(a)
- Q(c);N_GUARD::S(D),XP(a)
- Q(c);N_GUARD,N_PINB(H),SBLOCK::S(G)
- Q(c);N_GUARD,N_PINB(H)::S(D),XP(a)
- S(e);N_GUARD::QAB1(I),XS(e)
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).