MESON Chess Problem Database
Problem Display
PID: 70803 (3N1K2/1p4B1/3PRp2/1Q6/nP1kbq1R/2p4n/2Pb4/5N2 w - - 0 1)
Buchwald, Julius
The Chess Problem, 1944
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Qh2
- 2.Rhxe4#
- 2.Rexe4#
- 2.Qd3#
- 1...Qe3
- 2.Bxf6#
- 1...Qg3
- 2.Rhxe4#
- 2.Rexe4#
- 1...Qe5
- 2.Qd3#
- 1...Qg5
- 2.Rhxe4#
- 2.Rexe4#
- 2.Qd3#
- 1...Qxd6+
- 2.Rxd6#
- 1...Qh6
- 2.Rhxe4#
- 2.Rexe4#
- 2.Qd3#
- 1...Qxf1
- 2.Rhxe4#
- 2.Rexe4#
- 1...Qf2
- 2.Rhxe4#
- 2.Rexe4#
- 2.Qd3#
- 1...Qg4
- 2.Bxf6#
- 1...Qf5
- 2.Qd3#
- 1...Bh1
- 2.Bxf6#
- 2.Qd3#
- 1...Bxc2
- 2.Bxf6#
- 1...Bg2
- 2.Bxf6#
- 2.Qd3#
- 1...Bd3
- 2.Bxf6#
- 2.Qxd3#
- 1...Bf3
- 2.Bxf6#
- 2.Qd3#
- 1...Bd5
- 2.Bxf6#
- 2.Qd3#
- 1...Bf5
- 2.Bxf6#
- 1...Bc6
- 2.Bxf6#
- 2.Qd3#
- 1...Bg6
- 2.Bxf6#
- 1...Bh7
- 2.Bxf6#
- 1...Sb2
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sb6
- 2.Qc5#
- 1...Qh2
- Tries
- 1.Sc6+?
- 1...Bxc6
- 2.Bxf6#
- 2.Qd3#
- 1...bxc6!
- 1...Bxc6
- 1.Bxf6+?
- 1...Qe5
- 2.Bxe5#
- 2.Qd3#
- 1...Qxf6+!
- 1...Qe5
- 1.Rxf4?
- threat
- 2.Bxf6#
- 2.Rfxe4#
- 2.Rexe4#
- 2.Qd3#
- 1...Sxf4
- 2.Bxf6#
- 1...Sc5
- 2.Qxc5#
- 1...Sf2
- 2.Bxf6#
- 1...Sg5
- 2.Bxf6#
- 2.Qd3#
- 1...Sb2
- 2.Bxf6#
- 2.Rfxe4#
- 2.Rexe4#
- 2.Qc5#
- 1...Bxf4!
- threat
- 1.Rxe4+?
- 1...Qxe4
- 2.Se6#
- 2.Bxf6#
- 1...Kxe4!
- 1...Qxe4
- 1.Re7?
- threat
- 2.Se6#
- 1...Qxd6
- 2.Rxe4#
- 2.Qd3#
- 1...Qxf1
- 2.Rhxe4#
- 2.Rexe4#
- 1...Bxc2
- 2.Bxf6#
- 1...Sc5
- 2.Qxc5#
- 1...Qe5
- 2.Qd3#
- 1...Qg4
- 2.Bxf6#
- 1...Qf5
- 2.Qd3#
- 1...Bh1
- 2.Bxf6#
- 2.Qd3#
- 1...Bg2
- 2.Bxf6#
- 2.Qd3#
- 1...Bd3
- 2.Bxf6#
- 2.Qxd3#
- 1...Bf3
- 2.Bxf6#
- 2.Qd3#
- 1...Bd5
- 2.Bxf6#
- 2.Qd3#
- 1...Bf5
- 2.Bxf6#
- 1...Bc6
- 2.Bxf6#
- 2.Qd3#
- 1...Bg6
- 2.Bxf6#
- 1...Bh7
- 2.Bxf6#
- 1...Sg5!
- threat
- 1.Sc6+?
- Keys
- 1.Rxf6!
- threat
- 2.Se6#
- 2.Rfxf4#
- 1...Qxd6+
- 2.Rxd6#
- 1...Qxf6+
- 2.Bxf6#
- 1...Qxf1
- 2.Rf3#
- 1...Qxh4
- 2.Se6#
- 1...Bxc2
- 2.Rfxf4#
- 1...Bh1
- 2.Rfxf4#
- 1...Bg2
- 2.Rfxf4#
- 1...Bd3
- 2.Rfxf4#
- 1...Bf3
- 2.Rfxf4#
- 1...Bd5
- 2.Rfxf4#
- 1...Bf5
- 2.Re6#
- 1...Bc6
- 2.Rfxf4#
- 1...Bg6
- 2.Rfxf4#
- 1...Bh7
- 2.Rfxf4#
- 1...Sc5
- 2.Qxc5#
- 1...Qf3
- 2.Se6#
- 2.Rxf3#
- 2.Rff4#
- 2.Rf5#
- 1...Qh2
- 2.Se6#
- 2.Rff4#
- 1...Qe3
- 2.Se6#
- 2.Rf2#
- 2.Rf3#
- 2.Rff4#
- 2.Rf5#
- 2.Re6#
- 2.Rg6#
- 2.Rfh6#
- 2.Rf7#
- 1...Qg3
- 2.Se6#
- 1...Qe5
- 2.Qd3#
- 1...Qg5
- 2.Se6#
- 1...Qh6
- 2.Se6#
- 2.Rfxh6#
- 1...Qf2
- 2.Se6#
- 2.Rxf2#
- 2.Rf3#
- 2.Rff4#
- 2.Rf5#
- 1...Qg4
- 2.Rg6#
- 1...Qf5
- 2.Rxf5#
- 1...Sg5
- 2.Rfxf4#
- threat
- 1.Rxf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 6
- ADDED MATES = 12
- REMOVED MATES = 3
- Sets
- Q(g);N_GUARD,P_SPINB(f)::B(H),XP(h)
- Q(g);N_SPINP(h),P_SPINB(f)::QAR1(E)
- Q(g);CHECK,OGATE,P_SPINB(f),XP(F)::R(G),XQ(g)
- Q(g);N_GUARD::B(H),XP(h)
- Q(g);P_SPINB(f)::QAR1(E)
- B(f);P_SPINQ(g),XP(B)::B(H),XP(h)
- B(f);P_SPINQ(g)::B(H),XP(h)
- S(d);N_GUARD::QAB1(E)
- S(d);N_GUARD::QAB1(E),XS(d)
- Tries
- Try
- S(I);CHECK
- Refutation
- P(i);XS(I)
- Try
- B(H);CHECK,P_SPINB(H),XP(h)
- Refutation
- Q(g);CHECK,P_SPINB(f),XB(H)
- Try
- R(D);P_PINB(f),XQ(g)
- Threat
- DUALS(4)
- Vars
- S(c);N_SPINB(f),XR(D)::B(H),XP(h)
- S(d);N_GUARD::QAB1(E),XS(d)
- S(c);::B(H),XP(h)
- Refutation
- B(a);N_SPINB(f),XR(D)
- Try
- R(G);CHECK,XB(f)
- Refutation
- K(e);N_SPINP(h),P-FLIGHT,P_SPINQ(g),XR(G)
- Try
- R(G);
- Threat
- S(I)
- Vars
- B(f);P_SPINQ(g),XP(B)::B(H),XP(h)
- S(d);N_GUARD::QAB1(E),XS(d)
- Q(g);N_SPINP(h),P_SPINB(f)::QAR1(E)
- Q(g);N_GUARD::B(H),XP(h)
- Q(g);P_SPINB(f)::QAR1(E)
- B(f);P_SPINQ(g)::B(H),XP(h)
- Refutation
- S(c);
- Try
- Actual
- R(G);P_SPINR(G),XP(h)
- Threat
- DUALS(2)
- Vars
- Q(g);CHECK,N_PINR(G),P_SPINB(f),XP(F)::B(H)+R(G),DCHECK,XQ(g)
- Q(g);CHECK,OGATE,P_SPINB(f),P_SPINQ(g),XR(G)::B(H),XQ(g)
- Q(g);P_SPINB(f),XS(A)::B(H)+R(G)
- Q(g);N_PINR(G),XR(D)::S(I)
- B(f);P_SPINQ(g),XP(B)::B(H)+R(G),DCHECK,XQ(g)
- B(f);P_SPINQ(g)::B(H)+R(G),DCHECK,XQ(g)
- B(f);N_PINR(G),P_SPINQ(g)::B(H)+R(G)
- S(d);N_GUARD::QAB1(E),XS(d)
- Q(g);N_PINR(G),P_SPINB(f)::S(I)
- Q(g);N_PINR(G),P_SPINB(f),SBLOCK::QAR1(E)
- Q(g);N_PINR(G)::B(H)+R(G)
- Q(g);N_GUARD,P_SPINB(f)::B(H)+R(G),XQ(g)
- S(c);::B(H)+R(G),XQ(g)
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).