MESON Chess Problem Database
Problem Display
PID: 72289 (2rk2KR/2p1ppnP/2Q5/3b3r/B1N5/2b4q/7B/3R4 w - - 0 1)
Hay, RR
Chess, 1953
#2
8 + 10
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Qd7#
- 1...Qg2
- 2.Qd7#
- 1...Qd7
- 2.Qxd7#
- 1...Qxh2
- 2.Qd7#
- 1...Qd3
- 2.Qd7#
- 1...Qe3
- 2.Qd7#
- 1...Qf3
- 2.Qd7#
- 1...Qg3
- 2.Qd7#
- 1...Qh4
- 2.Qd7#
- 1...Re5
- 2.Kxg7#
- 1...Rf5
- 2.Qd7#
- 1...Ra8
- 2.Qxc7#
- 1...Rb8
- 2.Qxc7#
- 1...Be1
- 2.Kxg7#
- 1...Bd2
- 2.Kxg7#
- 1...Bb4
- 2.Kxg7#
- 1...Ba5
- 2.Kxg7#
- 1...Sf5
- 2.Qd7#
- 2.Qe8#
- 1...Se6
- 2.Qd7#
- 2.Qe8#
- 1...Se8
- 2.Qxe8#
- 1...e5
- 2.Qf6#
- 1...e6
- 2.Qd7#
- 1...f5+
- 2.Rxd5#
- 2.Qxd5#
- 1...f6+
- 2.Kxg7#
- 1...Qf1
- Tries
- 1.Se5?
- threat
- 2.Kxg7#
- 2.Sxf7#
- 1...f5+
- 2.Kxg7#
- 2.Sf7#
- 2.Rxd5#
- 2.Qxd5#
- 1...f6+
- 2.Kxg7#
- 2.Sf7#
- 1...Rxe5
- 2.Kxg7#
- 1...Rxh7
- 2.Sxf7#
- 1...Qd7
- 2.Qxd7#
- 1...Ra8
- 2.Kxg7#
- 1...Rb8
- 2.Kxg7#
- 1...e6
- 2.Qd7#
- 1...Qg4
- 2.Sxf7#
- 1...Qf1
- 2.Kxg7#
- 2.Rxd5#
- 2.Qxd5#
- 2.Qd7#
- 1...Qg2
- 2.Sxf7#
- 2.Qd7#
- 1...Qf5
- 2.Kxg7#
- 1...Qe6
- 2.Kxg7#
- 1...Qd3
- 2.Kxg7#
- 2.Qd7#
- 1...Qf3
- 2.Kxg7#
- 2.Qd7#
- 1...Qg3
- 2.Sxf7#
- 2.Rxd5#
- 2.Qxd5#
- 2.Qd7#
- 1...Rf5
- 2.Kxg7#
- 2.Rxd5#
- 2.Qxd5#
- 2.Qd7#
- 1...Rg5
- 2.Sxf7#
- 1...Bd2
- 2.Kxg7#
- 1...Bd4
- 2.Kxg7#
- 1...Sf5
- 2.Sxf7#
- 2.Qd7#
- 2.Qe8#
- 1...Se6
- 2.Sxf7#
- 2.Rxd5#
- 2.Qxd5#
- 2.Qd7#
- 2.Qe8#
- 1...Se8
- 2.Sxf7#
- 2.Qxe8#
- 1...Bxe5!
- threat
- 1.Rxd5+?
- 1...Qd7
- 2.Qxd7#
- 1...Rxd5!
- 1...Qd7
- 1.Qxd5+?
- 1...Qd7
- 2.Qxd7#
- 1...Rxd5!
- 1...Qd7
- 1.Se5?
- Keys
- 1.Sa5!
- threat
- 2.Sb7#
- 1...f5+
- 2.Rxd5#
- 2.Qxd5#
- 1...f6+
- 2.Kxg7#
- 1...Bxa5
- 2.Kxg7#
- 1...Qd7
- 2.Qxd7#
- 1...Ra8
- 2.Qxc7#
- 1...Rb8
- 2.Qxc7#
- 1...e5
- 2.Qf6#
- 1...e6
- 2.Qd7#
- threat
- 1.Sa5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 14
- Sets
- Q(b);N_GUARD::QAR1(E)
- Q(b);N_GUARD,N_SPINB(c)::QAR1(E),XQ(b)
- Q(b);N_GUARD,XB(B)::QAR1(E)
- Q(b);N_GUARD,N_SPINB(c)::QAR1(E)
- R(d);::R(H)+K(G),XS(h)
- R(d);S_CUTQ(b)::QAR1(E)
- R(i);N_GUARD::QAB1(E),XP(e)
- B(a);::R(H)+K(G),XS(h)
- B(a);N_SPINB(c)::R(H)+K(G),XS(h)
- S(h);N_GUARD::QAR1(E),XS(h)
- P(f);OGATEB::QAB(E)
- P(f);S_CUTQ(b)::QAR1(E)
- P(g);CHECK::R(H)+K(G),XS(h)
- Tries
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- R(d);XS(D)::R(H)+K(G),XS(h)
- R(d);XP(F)::S(D),XP(g)
- Q(b);N_GUARD,N_SPINB(c)::QAR1(E),XQ(b)
- R(i);::R(H)+K(G),XS(h)
- P(f);S_CUTQ(b)::QAR1(E)
- Q(b);::S(D),XP(g)
- Q(b);::R(H)+K(G),XS(h)
- R(d);::S(D),XP(g)
- B(a);N_SPINB(c)::R(H)+K(G),XS(h)
- Refutation
- B(a);XS(D)
- Try
- R(A);CHECK,XB(c)
- Vars
- Q(b);N_GUARD,P_SPINQ(b)::QAR1(E),XQ(b)
- Refutation
- R(d);XR(A)
- Try
- Q(E);CHECK,XB(c)
- Vars
- Q(b);N_GUARD,P_SPINQ(b)::QAR1(E),XQ(b)
- Refutation
- R(d);P_SPINR(d),XQ(E)
- Try
- Actual
- S(D);
- Threat
- S(D)
- Vars
- P(g);CHECK::R(H)+K(G),XS(h)
- B(a);XS(D)::R(H)+K(G),XS(h)
- Q(b);N_GUARD,N_SPINB(c)::QAR1(E),XQ(b)
- R(i);N_GUARD::QAB1(E),XP(e)
- P(f);OGATEB::QAB(E)
- P(f);S_CUTQ(b)::QAR1(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).