MESON Chess Problem Database
Problem Display
PID: 9931 (Kb6/1p2p2b/1R3p2/R2qkp2/6pr/4B1P1/2B2N2/1n2Q3 w - - 0 1)
Chandler, Guy Wills
The Problemist, 1960
#2
8 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxa5+
- 2.Qxa5#
- 1...Qb5
- 2.Raxb5#
- 1...Qc5
- 2.Rxc5#
- 1...Sd2
- 2.Qa1#
- 1...Sa3
- 2.Qc3#
- 2.Qa1#
- 1...Sc3
- 2.Qxc3#
- 1...f4
- 2.gxf4#
- 1...Qxa5+
- Tries
- 1.Sd1?
- threat
- 2.Bg1#
- 2.Bf2#
- 1...Qxa5+
- 2.Qxa5#
- 1...Qb5
- 2.Raxb5#
- 1...Qc5
- 2.Rxc5#
- 1...Rh1
- 2.Bg1#
- 1...Rh2
- 2.Bf2#
- 1...Sc3
- 2.Qxc3#
- 1...f4
- 2.gxf4#
- 1...Sd2!
- threat
- 1.Sh3?
- threat
- 2.Bg1#
- 2.Bf2#
- 1...Qxa5+
- 2.Qxa5#
- 1...Qb5
- 2.Raxb5#
- 1...Qc5
- 2.Rxc5#
- 1...Sd2
- 2.Qa1#
- 1...Sc3
- 2.Qxc3#
- 1...f4
- 2.gxf4#
- 1...gxh3!
- threat
- 1.Bxb1?
- threat
- 2.Qc3#
- 1...Qxa5+
- 2.Qxa5#
- 1...Qb5
- 2.Raxb5#
- 1...Qc5
- 2.Rxc5#
- 1...Bd6!
- threat
- 1.Qd2?
- threat
- 2.Bd4#
- 2.Bf4#
- 2.Rxd5#
- 2.Qd4#
- 2.Qxd5#
- 1...Qxa5+
- 2.Qxa5#
- 1...Bd6
- 2.Qxd5#
- 1...Qb5
- 2.Bf4#
- 2.Raxb5#
- 2.Qd4#
- 1...Qc5
- 2.Bf4#
- 2.Rxc5#
- 2.Qd4#
- 1...Bg8
- 2.Bd4#
- 2.Bf4#
- 2.Qd4#
- 1...Sc3
- 2.Bd4#
- 2.Bf4#
- 2.Qxc3#
- 2.Qd4#
- 1...f4
- 2.Bd4#
- 2.Bxf4#
- 2.Rxd5#
- 2.Qd4#
- 2.Qxd5#
- 2.gxf4#
- 1...e6
- 2.Bd4#
- 2.Bf4#
- 2.Qd4#
- 1...Sxd2!
- threat
- 1.Qb4?
- threat
- 2.Sd3#
- 2.Bd4#
- 2.Bf4#
- 2.Qxe7#
- 2.Qd4#
- 2.Qf4#
- 1...Qxa5+
- 2.Qxa5#
- 1...Qb5
- 2.Raxb5#
- 2.Qd4#
- 2.Qxb5#
- 1...Qc5
- 2.Rxc5#
- 2.Qxc5#
- 2.Qd4#
- 1...Bg8
- 2.Sd3#
- 2.Bd4#
- 2.Bf4#
- 2.Qd4#
- 2.Qf4#
- 1...f4
- 2.Bd4#
- 2.Bxf4#
- 2.Qxe7#
- 2.Qd4#
- 2.Qxf4#
- 2.gxf4#
- 1...e6
- 2.Sd3#
- 2.Bd4#
- 2.Bf4#
- 2.Qd4#
- 2.Qf4#
- 1...Bd6!
- threat
- 1.Qd1?
- threat
- 2.Bd4#
- 2.Bf4#
- 2.Rxd5#
- 2.Qd4#
- 2.Qxd5#
- 1...Bd6
- 2.Qxd5#
- 1...Qb5
- 2.Bf4#
- 2.Raxb5#
- 2.Qd4#
- 1...Qc5
- 2.Bf4#
- 2.Rxc5#
- 2.Qd4#
- 1...Bg8
- 2.Bd4#
- 2.Bf4#
- 2.Qd4#
- 1...Sd2
- 2.Qa1#
- 1...Sc3
- 2.Bd4#
- 2.Bf4#
- 2.Qd4#
- 1...f4
- 2.Bd4#
- 2.Bxf4#
- 2.Rxd5#
- 2.Qd4#
- 2.Qxd5#
- 2.gxf4#
- 1...e6
- 2.Bd4#
- 2.Bf4#
- 2.Qd4#
- 1...Qxa5+!
- threat
- 1.Sd1?
- Keys
- 1.Sh1!
- threat
- 2.Bg1#
- 2.Bf2#
- 1...Qxa5+
- 2.Qxa5#
- 1...Rxh1
- 2.Bg1#
- 1...Qb5
- 2.Raxb5#
- 1...Qc5
- 2.Rxc5#
- 1...Rh2
- 2.Bf2#
- 1...Sd2
- 2.Qa1#
- 1...Sc3
- 2.Qxc3#
- 1...f4
- 2.gxf4#
- threat
- 1.Sh1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(d);CHECK,N_SPINQ(d),OGATE,XR(F)::QAR(A),XQ(d)
- Q(d);OGATEB::R(F),XQ(d)
- S(a);OGATE::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(f);OGATE::P(E),XP(f)
- Tries
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XR(F)::QAR(A),XQ(d)
- Q(d);OGATEB::R(F),XQ(d)
- R(c);::QAR(A)+B(D)
- S(a);N_GUARD::QAB(A),XS(a)
- P(f);OGATE::P(E),XP(f)
- Refutation
- S(a);
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XR(F)::QAR(A),XQ(d)
- Q(d);OGATEB::R(F),XQ(d)
- S(a);OGATE::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(f);OGATE::P(E),XP(f)
- Refutation
- P(b);XS(C)
- Try
- B(B);XS(a)
- Threat
- QAB(A)
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XR(F)::QAR(A),XQ(d)
- Q(d);OGATEB::R(F),XQ(d)
- Refutation
- B(k);
- Try
- Q(A);
- Threat
- DUALS(5)
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XR(F)::QAR(A),XQ(d)
- B(k);::QAR1(A),XQ(d)
- Refutation
- S(a);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(6)
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XR(F)::QAR(A),XQ(d)
- Refutation
- B(k);
- Try
- Q(A);
- Threat
- DUALS(5)
- Vars
- B(k);::QAR1(A),XQ(d)
- S(a);OGATE::QAB(A)
- Refutation
- Q(d);CHECK,N_SPINQ(d),XR(F)
- Try
- Actual
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XR(F)::QAR(A),XQ(d)
- R(c);XS(C)::QAR(A)+B(D)
- Q(d);OGATEB::R(F),XQ(d)
- R(c);::QAR(A)+B(D)
- S(a);OGATE::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(f);OGATE::P(E),XP(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).