MESON Chess Problem Database
Problem Display
PID: 57599 (7N/3Q1p2/5k2/1P3NbR/r1P5/rPK2p2/p1P2P2/B3n3 w - - 0 1)
Stevenson, Edward
Chess Life, 1957
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Rxb3+
- 2.Kxb3#
- 1...Rb4
- 2.Kxb4#
- 1...Rxc4+
- 2.Kxc4#
- 1...Ra5
- 2.Kb4#
- 1...Ra6
- 2.Kb4#
- 1...Ra7
- 2.Kb4#
- 1...Ra8
- 2.Kb4#
- 1...Bc1
- 2.Qd6#
- 2.Qe7#
- 1...Bd2+
- 2.Kxd2#
- 1...Be3
- 2.Qd6#
- 2.Qe7#
- 1...Bf4
- 2.Qe7#
- 1...Bh4
- 2.Kd2#
- 2.Qd6#
- 2.Qe7#
- 1...Bh6
- 2.Qd6#
- 2.Qe7#
- 1...Sxc2
- 2.Kxc2#
- 1...Sg2
- 2.Kd3#
- 1...Sd3
- 2.Kxd3#
- 1...Rxb3+
- Tries
- 1.Kd4?
- threat
- 2.Ke4#
- 2.Kc5#
- 2.Kd5#
- 2.Qxf7#
- 1...Rxc4+
- 2.Kxc4#
- 1...Be3+
- 2.Kxe3#
- 1...Rxb3
- 2.Qxf7#
- 1...Ra7
- 2.Ke4#
- 2.Kc5#
- 2.Kd5#
- 1...Bc1
- 2.Qc6#
- 2.Qd6#
- 2.Qe7#
- 2.Qxf7#
- 1...Bd2
- 2.Qc6#
- 2.Qd6#
- 2.Qe7#
- 2.Qxf7#
- 1...Bf4
- 2.Qe7#
- 2.Qxf7#
- 1...Sd3
- 2.Kxd3#
- 2.Qxf7#
- 1...Sxc2+!
- threat
- 1.Se3?
- threat
- 2.Kd2#
- 1...Rxb3+
- 2.Kxb3#
- 1...Rxc4+
- 2.Kxc4#
- 1...Kg7
- 2.Qxf7#
- 1...Bxe3
- 2.Qxf7#
- 1...Sxc2
- 2.Kxc2#
- 1...Bf4
- 2.Qxf7#
- 1...Sd3
- 2.Kxd3#
- 1...Ke5!
- threat
- 1.Sg3?
- 1...Rxb3+
- 2.Kxb3#
- 1...Rxc4+
- 2.Kxc4#
- 1...Bd2+
- 2.Kxd2#
- 1...Kg7
- 2.Qxf7#
- 1...Sxc2
- 2.Kxc2#
- 1...Rb4
- 2.Kxb4#
- 1...Ra5
- 2.Kb4#
- 1...Ra6
- 2.Kb4#
- 1...Ra7
- 2.Kb4#
- 1...Ra8
- 2.Kb4#
- 1...Bc1
- 2.Qxf7#
- 1...Be3
- 2.Qxf7#
- 1...Bf4
- 2.Qxf7#
- 1...Bh4
- 2.Kd2#
- 2.Qxf7#
- 1...Bh6
- 2.Qxf7#
- 1...Sg2
- 2.Kd3#
- 1...Sd3
- 2.Kxd3#
- 1...Ke5!
- 1...Rxb3+
- 1.Sh4?
- 1...Rxb3+
- 2.Kxb3#
- 1...Rxc4+
- 2.Kxc4#
- 1...Bd2+
- 2.Kxd2#
- 1...Kg7
- 2.Qxf7#
- 1...Bxh4
- 2.Kd2#
- 2.Qxf7#
- 1...Sxc2
- 2.Kxc2#
- 1...Rb4
- 2.Kxb4#
- 1...Ra5
- 2.Kb4#
- 1...Ra6
- 2.Kb4#
- 1...Ra7
- 2.Kb4#
- 1...Ra8
- 2.Kb4#
- 1...Bc1
- 2.Qxf7#
- 1...Be3
- 2.Qxf7#
- 1...Bf4
- 2.Qxf7#
- 1...Bh6
- 2.Qxf7#
- 1...Sg2
- 2.Kd3#
- 1...Sd3
- 2.Kxd3#
- 1...Ke5!
- 1...Rxb3+
- 1.Sd6?
- 1...Rxb3+
- 2.Kxb3#
- 1...Rxc4+
- 2.Kxc4#
- 1...Bd2+
- 2.Kxd2#
- 1...Kg7
- 2.Qxf7#
- 1...Sxc2
- 2.Kxc2#
- 1...Rb4
- 2.Kxb4#
- 1...Ra5
- 2.Kb4#
- 1...Ra6
- 2.Kb4#
- 1...Ra7
- 2.Kb4#
- 1...Ra8
- 2.Kb4#
- 1...Bc1
- 2.Se8#
- 2.Qxf7#
- 1...Be3
- 2.Se8#
- 2.Qxf7#
- 1...Bf4
- 2.Se8#
- 2.Qxf7#
- 1...Bh4
- 2.Kd2#
- 2.Se8#
- 2.Qxf7#
- 1...Bh6
- 2.Se8#
- 2.Qxf7#
- 1...Sg2
- 2.Kd3#
- 1...Sd3
- 2.Kxd3#
- 1...Ke5!
- 1...Rxb3+
- 1.Qd5?
- 1...Rxb3+
- 2.Kxb3#
- 1...Rxc4+
- 2.Kxc4#
- 1...Bd2+
- 2.Kxd2#
- 1...Sxc2
- 2.Kxc2#
- 1...Rb4
- 2.Kxb4#
- 1...Ra5
- 2.Kb4#
- 1...Ra6
- 2.Kb4#
- 1...Ra7
- 2.Kb4#
- 1...Ra8
- 2.Kb4#
- 1...Bc1
- 2.Qd6#
- 1...Be3
- 2.Qd6#
- 1...Bh4
- 2.Kd2#
- 2.Qd6#
- 1...Bh6
- 2.Qd6#
- 1...Sg2
- 2.Kd3#
- 1...Sd3
- 2.Kxd3#
- 1...Bf4!
- 1...Rxb3+
- 1.Kd4?
- Keys
- 1.Sg7!
- 1...Rxb3+
- 2.Kxb3#
- 1...Rxc4+
- 2.Kxc4#
- 1...Bd2+
- 2.Kxd2#
- 1...Ke5
- 2.Qd4#
- 1...Kxg7
- 2.Qxf7#
- 1...Sxc2
- 2.Kxc2#
- 1...Rb4
- 2.Kxb4#
- 1...Ra5
- 2.Kb4#
- 1...Ra6
- 2.Kb4#
- 1...Ra7
- 2.Kb4#
- 1...Ra8
- 2.Kb4#
- 1...Bc1
- 2.Se8#
- 2.Qxf7#
- 1...Be3
- 2.Se8#
- 2.Qxf7#
- 1...Bf4
- 2.Se8#
- 2.Qxf7#
- 1...Bh4
- 2.Kd2#
- 2.Se8#
- 2.Qxf7#
- 1...Bh6
- 2.Se8#
- 2.Qxf7#
- 1...Sg2
- 2.Kd3#
- 1...Sd3
- 2.Kxd3#
- 1...Rxb3+
- 1.Sg7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- R(c);CHECK,XP(D)::B(A)+K(E),XR(c)
- R(e);::B(A)+K(E),XR(e)
- R(e);CHECK,XP(F)::B(A)+K(E),XR(e)
- R(e);::B(A)+K(E)
- B(f);CHECK::B(A)+K(E),XB(f)
- B(f);::QAB1(J)
- S(a);XP(B)::B(A)+K(E),XS(a)
- S(a);::B(A)+K(E)
- S(a);::B(A)+K(E),XS(a)
- Tries
- Try
- K(E);N_SPINP(D),P_SPINP(F),S_FLIGHT
- Threat
- DUALS(4)
- Vars
- R(e);CHECK,XP(F)::B(A)+K(E),XR(e)
- B(f);CHECK::B(A)+K(E),XB(f)
- R(c);XP(D)::QAR1(J),XP(h)
- Refutation
- S(a);CHECK,XP(B)
- Try
- S(H);
- Threat
- B(A)+K(E)
- Vars
- R(c);CHECK,XP(D)::B(A)+K(E),XR(c)
- R(e);CHECK,XP(F)::B(A)+K(E),XR(e)
- K(g);P_SPINP(h),S_FLIGHT::QAR1(J),XP(h)
- B(f);XS(H)::QAR1(J),XP(h)
- S(a);XP(B)::B(A)+K(E),XS(a)
- B(f);::QAR1(J),XP(h)
- S(a);::B(A)+K(E),XS(a)
- Refutation
- K(g);P_SPINB(f),S_FLIGHT
- Try
- S(H);
- Vars
- R(c);CHECK,XP(D)::B(A)+K(E),XR(c)
- R(e);CHECK,XP(F)::B(A)+K(E),XR(e)
- B(f);CHECK::B(A)+K(E),XB(f)
- K(g);P_SPINP(h),S_FLIGHT::QAR1(J),XP(h)
- S(a);XP(B)::B(A)+K(E),XS(a)
- R(e);::B(A)+K(E),XR(e)
- R(e);::B(A)+K(E)
- B(f);::QAR1(J),XP(h)
- S(a);::B(A)+K(E)
- S(a);::B(A)+K(E),XS(a)
- Refutation
- K(g);P_SPINB(f),S_FLIGHT
- Try
- S(H);
- Vars
- R(c);CHECK,XP(D)::B(A)+K(E),XR(c)
- R(e);CHECK,XP(F)::B(A)+K(E),XR(e)
- B(f);CHECK::B(A)+K(E),XB(f)
- K(g);P_SPINP(h),S_FLIGHT::QAR1(J),XP(h)
- S(a);XP(B)::B(A)+K(E),XS(a)
- R(e);::B(A)+K(E),XR(e)
- R(e);::B(A)+K(E)
- B(f);::QAR1(J),XP(h)
- S(a);::B(A)+K(E)
- S(a);::B(A)+K(E),XS(a)
- Refutation
- K(g);P_SPINB(f),S_FLIGHT
- Try
- S(H);
- Vars
- R(c);CHECK,XP(D)::B(A)+K(E),XR(c)
- R(e);CHECK,XP(F)::B(A)+K(E),XR(e)
- B(f);CHECK::B(A)+K(E),XB(f)
- K(g);P_SPINP(h),S_FLIGHT::QAR1(J),XP(h)
- S(a);XP(B)::B(A)+K(E),XS(a)
- R(e);::B(A)+K(E),XR(e)
- R(e);::B(A)+K(E)
- S(a);::B(A)+K(E)
- S(a);::B(A)+K(E),XS(a)
- Refutation
- K(g);P_SPINB(f),S_FLIGHT
- Try
- Q(J);
- Vars
- R(c);CHECK,XP(D)::B(A)+K(E),XR(c)
- R(e);CHECK,XP(F)::B(A)+K(E),XR(e)
- B(f);CHECK::B(A)+K(E),XB(f)
- S(a);XP(B)::B(A)+K(E),XS(a)
- R(e);::B(A)+K(E),XR(e)
- R(e);::B(A)+K(E)
- B(f);::QAR2(J)
- S(a);::B(A)+K(E)
- S(a);::B(A)+K(E),XS(a)
- Refutation
- B(f);
- Try
- Actual
- S(H);
- Vars
- R(c);CHECK,XP(D)::B(A)+K(E),XR(c)
- R(e);CHECK,XP(F)::B(A)+K(E),XR(e)
- B(f);CHECK::B(A)+K(E),XB(f)
- K(g);P_SPINB(f),S_FLIGHT::QAB1(J)
- K(g);P_SPINP(h),S_FLIGHT,XS(H)::QAR1(J),XP(h)
- S(a);XP(B)::B(A)+K(E),XS(a)
- R(e);::B(A)+K(E),XR(e)
- R(e);::B(A)+K(E)
- S(a);::B(A)+K(E)
- S(a);::B(A)+K(E),XS(a)
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).