MESON Chess Problem Database

Problem Display
PID: 103535 (3b4/4r3/4P3/B7/3p4/3BNQp1/2KNPpP1/4k3 w - - 0 1)

Fagan, AA

Toronto Star, 1950

3b4/4r3/4P3/B7/3p4/3BNQp1/2KNPpP1/4k3

#2

9 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7+
      • 2.Sdc4#
    • 1...f1Q
      • 2.Qxf1#
    • 1...f1S
      • 2.Qxf1#
    • 1...f1B
      • 2.Qxf1#
      • 2.Qxg3#
    • 1...f1R
      • 2.Qxf1#
  • Tries
    • 1.Kc1?
      • threat
        • 2.Sc2#
      • 1...Rc7+
        • 2.Sdc4#
      • 1...dxe3!
    • 1.Qxf2+?
      • 1...gxf2
        • 2.Sf3#
      • 1...Kxf2!
    • 1.Qxg3?
      • threat
        • 2.Sf3#
      • 1...Rc7+
        • 2.Sdc4#
      • 1...dxe3!
    • 1.Qf4?
      • threat
        • 2.Sf3#
      • 1...Rc7+
        • 2.Sdc4#
      • 1...f1Q
        • 2.Qxf1#
      • 1...f1S
        • 2.Qxf1#
      • 1...f1B
        • 2.Qxg3#
        • 2.Qxf1#
      • 1...f1R
        • 2.Qxf1#
      • 1...dxe3!
    • 1.Qf5?
      • threat
        • 2.Sf3#
      • 1...Rc7+
        • 2.Sdc4#
      • 1...f1Q
        • 2.Qxf1#
      • 1...f1S
        • 2.Qxf1#
      • 1...f1B
        • 2.Qxf1#
      • 1...f1R
        • 2.Qxf1#
      • 1...dxe3!
    • 1.Qf7?
      • threat
        • 2.Sf3#
      • 1...Rc7+
        • 2.Sdc4#
      • 1...f1Q
        • 2.Qxf1#
      • 1...f1S
        • 2.Qxf1#
      • 1...f1B
        • 2.Qxf1#
      • 1...f1R
        • 2.Qxf1#
      • 1...dxe3!
    • 1.Qf8?
      • threat
        • 2.Sf3#
      • 1...Rc7+
        • 2.Sdc4#
      • 1...f1Q
        • 2.Qxf1#
      • 1...f1S
        • 2.Qxf1#
      • 1...f1B
        • 2.Qxf1#
      • 1...f1R
        • 2.Qxf1#
      • 1...dxe3!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Sf3#
      • 1...Rc7+
        • 2.Sdc4#
      • 1...dxe3
        • 2.Qa1#
      • 1...f1Q
        • 2.Qxf1#
      • 1...f1S
        • 2.Qxf1#
      • 1...f1B
        • 2.Qxf1#
      • 1...f1R
        • 2.Qxf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(e);CHECK,S_CUTB(f)::B(H)+S(B)
    • P(b);OGATE::QAR1(G),XQ(b)
    • P(b);OGATE::QAR1(G),XS(b)
    • P(b);OGATE::QAR1(G),XR(b)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • S(F)
      • Vars
        • R(e);CHECK,S_CUTB(f)::B(H)+S(B)
      • Refutation
        • P(d);XS(F)
    • Try
      • Q(G);CHECK,XP(b)
      • Vars
        • P(c);SBLOCK,XQ(G)::B(H)+S(B),DCHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(G)
    • Try
      • Q(G);P_PINP(b),XP(c)
      • Threat
        • B(H)+S(B),DCHECK
      • Vars
        • R(e);CHECK,S_CUTB(f)::B(H)+S(B)
      • Refutation
        • P(d);XS(F)
    • Try
      • Q(G);
      • Threat
        • B(H)+S(B),DCHECK
      • Vars
        • R(e);CHECK,S_CUTB(f)::B(H)+S(B)
        • P(b);OGATE::QAR1(G),XQ(b)
        • P(b);OGATE::QAR1(G),XS(b)
        • P(b);OGATE::QAR1(G),XR(b)
      • Refutation
        • P(d);XS(F)
    • Try
      • Q(G);
      • Threat
        • B(H)+S(B),DCHECK
      • Vars
        • R(e);CHECK,S_CUTB(f)::B(H)+S(B)
        • P(b);OGATE::QAR1(G),XQ(b)
        • P(b);OGATE::QAR1(G),XS(b)
        • P(b);OGATE::QAR1(G),XB(b)
        • P(b);OGATE::QAR1(G),XR(b)
      • Refutation
        • P(d);XS(F)
    • Try
      • Q(G);
      • Threat
        • B(H)+S(B),DCHECK
      • Vars
        • R(e);CHECK,S_CUTB(f)::B(H)+S(B)
        • P(b);OGATE::QAR1(G),XQ(b)
        • P(b);OGATE::QAR1(G),XS(b)
        • P(b);OGATE::QAR1(G),XB(b)
        • P(b);OGATE::QAR1(G),XR(b)
      • Refutation
        • P(d);XS(F)
    • Try
      • Q(G);
      • Threat
        • B(H)+S(B),DCHECK
      • Vars
        • R(e);CHECK,S_CUTB(f)::B(H)+S(B)
        • P(b);OGATE::QAR1(G),XQ(b)
        • P(b);OGATE::QAR1(G),XS(b)
        • P(b);OGATE::QAR1(G),XB(b)
        • P(b);OGATE::QAR1(G),XR(b)
      • Refutation
        • P(d);XS(F)
  • Actual
    • Q(G);
    • Threat
      • B(H)+S(B),DCHECK
    • Vars
      • R(e);CHECK,S_CUTB(f)::B(H)+S(B)
      • P(d);OGATE,XS(F)::QAR(G)
      • P(b);OGATE::QAR1(G),XQ(b)
      • P(b);OGATE::QAR1(G),XS(b)
      • P(b);OGATE::QAR1(G),XB(b)
      • P(b);OGATE::QAR1(G),XR(b)
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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).