MESON Chess Problem Database

Problem Display
PID: 160467 (8/2P5/8/3p3B/3r3P/7k/2r2PNP/4BQK1 w - - 0 1)

Rice, John Michael

British Chess Magazine, 2009

8/2P5/8/3p3B/3r3P/7k/2r2PNP/4BQK1

#2

9 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Qxd3#
    • 1...Ra4
      • 2.Qd3#
    • 1...Rb4
      • 2.Qd3#
    • 1...Rc4
      • 2.Qd3#
    • 1...Rxh4
      • 2.Se3#
      • 2.Sf4#
      • 2.Qd3#
  • Tries
    • 1.f3?
      • threat
        • 2.Sf4#
      • 1...Rxg2+
        • 2.Qxg2#
      • 1...Rf4
        • 2.Sxf4#
      • 1...Rg4
        • 2.Bxg4#
      • 1...Rf2!
    • 1.c8Q+?
      • 1...Rg4
        • 2.Bxg4#
        • 2.Qd3#
        • 2.Qxg4#
      • 1...Rxc8!
    • 1.c8B+?
      • 1...Rg4
        • 2.Bhxg4#
        • 2.Bcxg4#
        • 2.Qd3#
      • 1...Rxc8!
  • Keys
    • 1.f4!
      • threat
        • 2.Qf3#
      • 1...Rxg2+
        • 2.Qxg2#
      • 1...Rxf4
        • 2.Sxf4#
      • 1...Rf2
        • 2.c8Q#
        • 2.c8B#
      • 1...Rc3
        • 2.Se3#
      • 1...Rd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD::QAR(B),XR(c)
    • R(c);N_GUARD,SBLOCK::QAR(B)
    • R(c);N_GUARD::QAR(B)
  • Tries
    • Try
      • P(D);
      • Threat
        • QAB(B)+S(E),DCHECK
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XS(E)::QAB1(B),XR(a)
        • R(c);::QAB(B)+S(E),DCHECK,XR(c)
        • R(c);N_GUARD,P_PINS(E)::B(H),XR(c)
      • Refutation
        • R(a);
    • Try
      • P(I);CHECK
      • Refutation
        • R(a);XQ(I)
    • Try
      • P(I);CHECK
      • Refutation
        • R(a);XB(I)
  • Actual
    • P(D);
    • Threat
      • QAR2(B)
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XS(E)::QAB1(B),XR(a)
      • R(c);XP(D)::QAB(B)+S(E),DCHECK,XR(c)
      • R(a);N_GUARD::P=Q
      • R(a);N_GUARD::QAB(B)+S(E)
      • R(c);N_GUARD::QAR(B),XR(c)
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