MESON Chess Problem Database
Problem Display
PID: 139245 (bb4k1/6P1/2R2PP1/1rPKN1p1/2BBR3/3r4/8/7q w - - 0 1)
Davis, Edward
The Problemist, 1937
#2
10 + 7
SOLUTION
- SOUND
- Sets
- 1...Qxe4+
- 2.Kxe4#
- 1...Rxd4+
- 2.Kxd4#
- 1...Rxc5+
- 2.Kxc5#
- 1...Rb7
- 2.Rc8#
- 1...Bxc6+
- 2.Kxc6#
- 1...Bxe5
- 2.Kxe5#
- 1...Bd6
- 2.Kxd6#
- 1...Ba7
- 2.Kd6#
- 1...Qxe4+
- Tries
- 1.Sxd3?
- threat
- 2.f7#
- 1...Qxe4+
- 2.Kxe4#
- 1...Rxc5+
- 2.Kxc5#
- 1...Bxc6+
- 2.Kxc6#
- 1...Qf1
- 2.Re8#
- 1...Rb7
- 2.Rc8#
- 1...Be5
- 2.Kxe5#
- 1...Qf3!
- threat
- 1.Sf3?
- threat
- 2.Re8#
- 2.f7#
- 1...Rxd4+
- 2.Kxd4#
- 1...Rxc5+
- 2.Kxc5#
- 1...Bxc6+
- 2.Kxc6#
- 1...Rxf3
- 2.Re8#
- 1...Qe1
- 2.f7#
- 1...Re3
- 2.f7#
- 1...Rb7
- 2.Re8#
- 2.Rc8#
- 1...Be5
- 2.Kxe5#
- 1...Bd6
- 2.Kxd6#
- 2.f7#
- 1...Qxf3!
- threat
- 1.Sd7?
- threat
- 2.f7#
- 1...Qxe4+
- 2.Kxe4#
- 1...Rxd4+
- 2.Kxd4#
- 1...Rxc5+
- 2.Kxc5#
- 1...Bxc6+
- 2.Kxc6#
- 1...Qf1
- 2.Re8#
- 1...Rf3
- 2.Re8#
- 1...Be5
- 2.Kxe5#
- 1...Qf3!
- threat
- 1.Sxd3?
- Keys
- 1.Sg4!
- threat
- 2.f7#
- 1...Qxe4+
- 2.Kxe4#
- 1...Rxd4+
- 2.Kxd4#
- 1...Rxc5+
- 2.Kxc5#
- 1...Bxc6+
- 2.Kxc6#
- 1...Qf3
- 2.Sh6#
- 1...Qf1
- 2.Sh6#
- 2.Re8#
- 1...Rf3
- 2.Re8#
- 1...Rb7
- 2.Rc8#
- 1...Be5
- 2.Kxe5#
- threat
- 1.Sg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- Q(a);CHECK,P_PINR(G),XR(C)::B(A)+K(E),XQ(a)
- R(b);CHECK,XB(B)::B(A)+K(E),XR(b)
- R(c);CHECK,XP(D)::B(A)+K(E),XR(c)
- R(c);N_PINP(D),OGATE::R(G)
- B(e);CHECK,XR(G)::B(A)+K(E),XB(e)
- B(f);XS(F)::B(A)+K(E),XB(f)
- B(f);::B(A)+K(E),XB(f)
- B(f);::B(A)+K(E)
- Tries
- Try
- S(F);N_SPINB(B),XR(b)
- Threat
- P(H)
- Vars
- Q(a);CHECK,P_PINR(G),XR(C)::B(A)+K(E),XQ(a)
- R(c);CHECK,XP(D)::B(A)+K(E),XR(c)
- B(e);CHECK,XR(G)::B(A)+K(E),XB(e)
- Q(a);N_PINR(C),P_PINR(G)::R(C)
- R(c);N_PINP(D),OGATE::R(G)
- B(f);::B(A)+K(E),XB(f)
- Refutation
- Q(a);
- Try
- S(F);N_SPINR(C),P_SPINR(G)
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,XB(B)::B(A)+K(E),XR(b)
- R(c);CHECK,XP(D)::B(A)+K(E),XR(c)
- B(e);CHECK,XR(G)::B(A)+K(E),XB(e)
- R(b);N_PINB(B),XS(F)::R(C)
- Q(a);::P(H)
- R(b);N_PINB(B)::P(H)
- B(f);::B(A)+K(E),XB(f)
- Refutation
- Q(a);N_PINR(G),P_PINR(C),XS(F)
- Try
- S(F);
- Threat
- P(H)
- Vars
- Q(a);CHECK,P_PINR(G),XR(C)::B(A)+K(E),XQ(a)
- R(b);CHECK,XB(B)::B(A)+K(E),XR(b)
- R(c);CHECK,XP(D)::B(A)+K(E),XR(c)
- B(e);CHECK,XR(G)::B(A)+K(E),XB(e)
- Q(a);N_PINR(C),P_PINR(G)::R(C)
- R(b);N_PINB(B),N_PINR(C),P_PINR(G)::R(C)
- B(f);::B(A)+K(E),XB(f)
- Refutation
- Q(a);
- Try
- Actual
- S(F);
- Threat
- P(H)
- Vars
- Q(a);CHECK,P_PINR(G),XR(C)::B(A)+K(E),XQ(a)
- R(b);CHECK,XB(B)::B(A)+K(E),XR(b)
- R(c);CHECK,XP(D)::B(A)+K(E),XR(c)
- B(e);CHECK,XR(G)::B(A)+K(E),XB(e)
- Q(a);N_GUARD::S(F)
- R(b);N_PINB(B),N_PINR(C),P_PINR(G)::R(C)
- R(c);N_PINP(D),OGATE::R(G)
- B(f);::B(A)+K(E),XB(f)
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).