MESON Chess Problem Database
Problem Display
PID: 71348 (3K1N2/4R2b/2N2p1p/5k2/R4P1r/3P1r1P/3qp1Q1/1BB5 w - - 0 1)
Boros, Sandor
5th HM., Arbejder Skak 06. TT, 1942
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Sd4#
- 1...Qa5+
- 2.Rxa5#
- 1...Qd1
- 2.Sd4#
- 2.Ra5#
- 1...Qa2
- 2.Sd4#
- 1...Qc2
- 2.Sd4#
- 1...Qxd3+
- 2.Sd4#
- 1...Rf1
- 2.Qe4#
- 2.Qd5#
- 1...Rf2
- 2.Qe4#
- 2.Qd5#
- 1...Rxd3+
- 2.Qd5#
- 1...Rg3
- 2.Qe4#
- 2.Qd5#
- 1...Rfxf4
- 2.Qd5#
- 1...Rg4
- 2.Qxg4#
- 2.hxg4#
- 1...Rh5
- 2.Qg4#
- 1...Bg6
- 2.Qxg6#
- 1...Bg8
- 2.Qg6#
- 1...Qe1
- Tries
- 1.Bxd2?
- threat
- 2.Sd4#
- 2.Ra5#
- 1...Rxd3+
- 2.Sd4#
- 2.Bxd3#
- 2.Qd5#
- 1...Rfxf4
- 2.Ra5#
- 2.Qd5#
- 1...Rhxf4
- 2.Ra5#
- 1...e1Q
- 2.Sd4#
- 1...e1R
- 2.Sd4#
- 1...Bg8
- 2.Sd4#
- 2.Qg6#
- 1...Re3!
- threat
- 1.Re6?
- threat
- 2.Se7#
- 1...Qa5+
- 2.Rxa5#
- 1...Qxd3+
- 2.Sd4#
- 1...Rxd3+
- 2.Qd5#
- 1...Qb4!
- threat
- 1.Rxh7?
- threat
- 2.Se7#
- 2.Qg6#
- 1...Qa5+
- 2.Rxa5#
- 1...Rxd3+
- 2.Qd5#
- 1...Qxf4
- 2.Qg6#
- 1...Rfxf4
- 2.Qd5#
- 2.Qg6#
- 1...Rhxf4
- 2.Qg6#
- 1...e1Q
- 2.Qg6#
- 1...e1R
- 2.Qg6#
- 1...Qb4
- 2.Qg6#
- 1...Qe3
- 2.Qg6#
- 1...Re3
- 2.Qg6#
- 1...Rg3
- 2.Se7#
- 2.Qe4#
- 2.Qd5#
- 1...Rg4
- 2.Se7#
- 2.Qxg4#
- 2.hxg4#
- 1...Qxd3+!
- threat
- 1.Qxf3?
- threat
- 2.Sd4#
- 2.Qe4#
- 2.Qd5#
- 1...Qa5+
- 2.Rxa5#
- 1...Qxd3+
- 2.Sd4#
- 2.Bxd3#
- 2.Qd5#
- 2.Qxd3#
- 1...Qxf4
- 2.Ra5#
- 1...Rxh3
- 2.Sd4#
- 2.Qxh3#
- 1...Rxf4
- 2.Qd5#
- 2.Qh5#
- 1...e1Q
- 2.Sd4#
- 1...e1R
- 2.Sd4#
- 1...Qb4
- 2.Qd5#
- 1...Qc3
- 2.Qe4#
- 1...Qa2
- 2.Sd4#
- 2.Qe4#
- 1...Qb2
- 2.Qe4#
- 1...Bg8
- 2.Sd4#
- 2.Qe4#
- 1...Qe3!
- threat
- 1.Qg5+?
- 1...fxg5
- 2.Rf7#
- 1...hxg5!
- 1...fxg5
- 1.d4+?
- 1...Qc2
- 2.Ra5#
- 1...Qd3
- 2.Ra5#
- 1...Rd3
- 2.Qe4#
- 1...Kxf4!
- 1...Qc2
- 1.Bxd2?
- Keys
- 1.Se6!
- threat
- 2.Scd4#
- 2.Sg7#
- 1...Qa5+
- 2.Rxa5#
- 1...Qxd3+
- 2.Sed4#
- 1...Rxd3+
- 2.Scd4#
- 1...Qxf4
- 2.Sg7#
- 1...Rfxf4
- 2.Sg7#
- 1...Rhxf4
- 2.Sg7#
- 1...Rg3
- 2.Qe4#
- 1...Rg4
- 2.Qxg4#
- 1...Qc3
- 2.Sg7#
- 1...Qe3
- 2.Sg7#
- 1...Qb4
- 2.Sg7#
- 1...Qb2
- 2.Sg7#
- threat
- 1.Se6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 8
- REMOVED MATES = 6
- Sets
- Q(a);N_PINP(D)::S(H)
- Q(a);CHECK,N_GUARD,N_PINP(D)::R(F),XQ(a)
- Q(a);CHECK,P_SPINQ(a),XP(D)::S(H)
- R(c);CHECK,OGATE,P_SPINR(c),XP(D)::QAR2(C)
- R(c);OGATE,XP(G)::QAR2(C)
- R(d);N_GUARD::QAB1(C)
- B(h);N_GUARD::QAB1(C),XB(h)
- B(h);N_GUARD::QAB1(C)
- Tries
- Try
- B(B);N_SPINP(D),XQ(a)
- Threat
- DUALS(2)
- Vars
- R(d);XP(G)::R(F)
- P(b);::S(H)
- Refutation
- R(c);
- Try
- R(I);
- Threat
- S(H)
- Vars
- Q(a);CHECK,N_GUARD,N_PINP(D)::R(F),XQ(a)
- Q(a);CHECK,P_SPINQ(a),XP(D)::S(H)
- R(c);CHECK,OGATE,P_SPINR(c),XP(D)::QAR2(C)
- Refutation
- Q(a);N_PINP(D)
- Try
- R(I);XB(h)
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK,N_GUARD,N_PINP(D)::R(F),XQ(a)
- R(c);CHECK,OGATE,P_SPINR(c),XP(D)::QAR2(C)
- Q(a);N_PINP(D),XP(G)::QAB1(C)
- R(d);XP(G)::QAB1(C)
- P(b);::QAB1(C)
- Q(a);N_PINP(D)::QAB1(C)
- R(c);::QAB1(C)
- Refutation
- Q(a);CHECK,P_SPINQ(a),XP(D)
- Try
- Q(C);XR(c)
- Threat
- DUALS(3)
- Vars
- Q(a);CHECK,N_GUARD,N_PINP(D)::R(F),XQ(a)
- Q(a);N_GUARD,N_PINP(D),P_SPINQ(a),XP(G)::R(F)
- P(b);::S(H)
- Q(a);N_PINP(D)::QAR2(C)
- Q(a);N_PINP(D)::QAB1(C)
- Refutation
- Q(a);N_PINP(D)
- Try
- Q(C);CHECK
- Vars
- P(f);S_CUTP(g),XQ(C)::R(I)
- Refutation
- P(g);XQ(C)
- Try
- P(D);CHECK
- Vars
- Q(a);N_PINP(D),P_SPINQ(a)::R(F)
- Q(a);P_SPINQ(a)::R(F)
- R(c);OGATE,P_SPINR(c)::QAB1(C)
- Refutation
- K(e);P-FLIGHT,P_SPINQ(a),XP(G)
- Try
- Actual
- S(K);
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK,N_GUARD,N_PINP(D)::R(F),XQ(a)
- Q(a);CHECK,P_SPINQ(a),XP(D)::S(K)
- R(c);CHECK,P_SPINR(c),XP(D)::S(H)
- Q(a);N_PINP(D),XP(G)::S(K)
- R(c);XP(G)::S(K)
- R(d);XP(G)::S(K)
- R(c);OGATE::QAB1(C)
- R(d);N_GUARD::QAB1(C),XR(d)
- Q(a);N_PINP(D)::S(K)
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).