MESON Chess Problem Database

Problem Display
PID: 182578 (2r5/p2B3N/2P1NR2/Q1K1k1rb/4p3/4p3/n7/8 w - - 0 1)

Rice, John Michael

1st Prize, Problem Observer, 2015

2r5/p2B3N/2P1NR2/Q1K1k1rb/4p3/4p3/n7/8

#2

7 + 8

136 Problem Observer 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc6+
      • 2.Kxc6#
    • 1...Rc7
      • 2.Qxc7#
    • 1...Ra8
      • 2.Qc7#
    • 1...Rb8
      • 2.Qc7#
    • 1...Rd8
      • 2.Qc7#
    • 1...Re8
      • 2.Qc7#
    • 1...Rf8
      • 2.Qc7#
    • 1...Rg8
      • 2.Qc7#
    • 1...Rh8
      • 2.Qc7#
    • 1...Sc1
      • 2.Qc3#
      • 2.Qa1#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sb4
      • 2.Qa1#
  • Tries
    • 1.Sexg5?
      • threat
        • 2.Kc4#
        • 2.Rf5#
      • 1...Be2
        • 2.Sf7#
        • 2.Rf5#
      • 1...Rb8
        • 2.Rf5#
        • 2.Qc7#
      • 1...Rf8
        • 2.Kc4#
        • 2.Qc7#
      • 1...Bg4
        • 2.Kc4#
        • 2.Sf7#
      • 1...Bg6
        • 2.Kc4#
      • 1...Bf7
        • 2.Sxf7#
        • 2.Rf5#
      • 1...Sc3
        • 2.Rf5#
        • 2.Qxc3#
      • 1...Sb4
        • 2.Rf5#
        • 2.Qa1#
      • 1...Rxc6+!
    • 1.Qxa2?
      • threat
        • 2.Qd5#
        • 2.Qa1#
        • 2.Qb2#
      • 1...Rg1
        • 2.Qd5#
        • 2.Qb2#
      • 1...Rg2
        • 2.Qd5#
      • 1...Rb8
        • 2.Qd5#
      • 1...Rxc6+!
    • 1.Qa4?
      • threat
        • 2.Qd4#
      • 1...Sb4
        • 2.Qa1#
      • 1...Rxc6+!
    • 1.c7?
      • threat
        • 2.Kc6#
      • 1...Rxc7+
        • 2.Qxc7#
      • 1...Rb8
        • 2.cxb8Q#
        • 2.cxb8B#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sb4
        • 2.Qa1#
      • 1...Be2!
  • Keys
    • 1.Sd8!
      • threat
        • 2.Kc4#
      • 1...Rxc6+
        • 2.Sxc6#
      • 1...Rf5
        • 2.Rxf5#
      • 1...Be2
        • 2.Sf7#
      • 1...Rb8
        • 2.Qc7#
      • 1...Bf7
        • 2.Sxf7#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sb4
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(h);CHECK,XP(C)::QAR(A)+K(B),XR(h)
    • R(h);N_GUARD::QAB(A),XR(h)
    • R(h);N_GUARD,N_PINP(C)::QAB(A)
    • S(a);N_GUARD::QAB(A),XS(a)
    • S(a);OGATE::QAB(A)
  • Tries
    • Try
      • S(D);XR(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(f);::QAR(A)+K(B)
      • Refutation
        • R(h);CHECK,XP(C)
    • Try
      • Q(A);XS(a)
      • Threat
        • DUALS(3)
      • Vars
        • R(e);::QAR1(A)
        • R(h);N_PINP(C)::QAR1(A)
      • Refutation
        • R(h);CHECK,XP(C)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);OGATE::QAB(A)
      • Refutation
        • R(h);CHECK,XP(C)
    • Try
      • P(C);
      • Threat
        • QAR(A)+K(B)
      • Vars
        • R(h);CHECK,OGATE,XP(C)::QAB(A),XR(h)
        • R(h);N_PINP(C)::PXR(h)=Q
        • S(a);N_GUARD::QAB(A),XS(a)
        • S(a);OGATE::QAB(A)
      • Refutation
        • B(f);
  • Actual
    • S(D);
    • Threat
      • QAR(A)+K(B)
    • Vars
      • R(h);CHECK,XP(C)::S(D),XR(h)
      • R(e);N_GUARD::R1(E),XR(e)
      • B(f);N_GUARD::S(D)
      • R(h);N_GUARD,N_PINP(C)::QAB(A)
      • B(f);N_GUARD::S(D),XB(f)
      • S(a);N_GUARD::QAB(A),XS(a)
      • S(a);OGATE::QAB(A)
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