MESON Chess Problem Database

Problem Display
PID: 43569 (8/3p4/3p4/pB1kbpNK/1PR1q3/3pp3/6Q1/8 w - - 0 1)

Rice, John Michael

British Chess Magazine, 2002

8/3p4/3p4/pB1kbpNK/1PR1q3/3pp3/6Q1/8

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3+
      • 2.Qxf3#
    • 1...f4
      • 2.Qxe4#
  • Tries
    • 1.Rxe4?
      • threat
        • 2.Rc4#
        • 2.Rf4#
        • 2.Rg4#
        • 2.Rh4#
        • 2.Qa2#
      • 1...axb4
        • 2.Rc4#
      • 1...fxe4
        • 2.Qxe4#
      • 1...Ba1
        • 2.Qa2#
      • 1...Bh2
        • 2.Qa2#
      • 1...Bc3
        • 2.Qa2#
      • 1...Bg3
        • 2.Qa2#
      • 1...Bd4
        • 2.Rxe3#
        • 2.Re6#
        • 2.Re7#
        • 2.Re8#
        • 2.Qa2#
      • 1...Bf4
        • 2.Qa2#
      • 1...Bf6
        • 2.Qa2#
      • 1...Bg7
        • 2.Qa2#
      • 1...Bh8
        • 2.Qa2#
      • 1...d2
        • 2.Rc4#
        • 2.Rf4#
        • 2.Rg4#
        • 2.Rh4#
      • 1...e2
        • 2.Rc4#
        • 2.Rf4#
        • 2.Rg4#
        • 2.Rh4#
      • 1...f4
        • 2.Rxf4#
        • 2.Qa2#
      • 1...Bb2!
    • 1.Rc5+?
      • 1...Kd4
        • 2.Qb2#
      • 1...dxc5!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Rxe4#
      • 1...Qh1+
        • 2.Rh4#
      • 1...Qf3+
        • 2.Rg4#
      • 1...Qg4+
        • 2.Rxg4#
      • 1...Qh4+
        • 2.Rxh4#
      • 1...Qxc4
        • 2.Qxc4#
      • 1...axb4
        • 2.Qa8#
      • 1...Bd4
        • 2.Rc5#
      • 1...Qg2
        • 2.Qxg2#
      • 1...Qd4
        • 2.Rc5#
      • 1...Qf4
        • 2.Re4#
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • Q(c);CHECK,OGATEB::QAB(A),XQ(c)
    • P(g);N_GUARD::QAB1(A),XQ(c)
  • Tries
    • Try
      • R(C);XQ(c)
      • Threat
        • DUALS(5)
      • Vars
        • P(d);XP(B)::QAB(A)+R(C)
        • P(g);OGATE,P_SPINP(g),XR(C)::QAB1(A),XP(g)
        • B(f);::QAB(A)
      • Refutation
        • B(f);
    • Try
      • R(C);CHECK
      • Vars
        • K(e);N_SPINQ(c),P-FLIGHT::QAB(A)
      • Refutation
        • P(h);XR(C)
  • Actual
    • Q(A);N_PINQ(c)
    • Threat
      • QAB(A)+R(C),XQ(c)
    • Vars
      • Q(c);CHECK,OGATE::QAB(A)+R(C)
      • Q(c);CHECK,OGATE::QAB(A)+R(C),XQ(c)
      • Q(c);OGATE,P_SPINQ(c),XR(C)::QAB1(A),XQ(c)
      • P(d);OGATE,XP(B)::QAB(A)
      • B(f);SBLOCK::QAB(A)+R(C),DCHECK
      • Q(c);OGATEB::QAB(A),XQ(c)
      • Q(c);SBLOCK::QAB(A)+R(C),DCHECK
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