MESON Chess Problem Database

Problem Display
PID: 11062 (3R1Bb1/q7/2R2N2/3rk1p1/6B1/3pNPP1/r5p1/b3Q1K1 w - - 0 1)

Mussuri, Petr Stepanovich

Chess, 1936

3R1Bb1/q7/2R2N2/3rk1p1/6B1/3pNPP1/r5p1/b3Q1K1

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Sf5#
    • 1...Qxe3+
      • 2.Qxe3#
    • 1...Qb8
      • 2.Sc2#
    • 1...Qa3
      • 2.Sc2#
    • 1...Qa6
      • 2.Sc2#
    • 1...Qb7
      • 2.Sc2#
    • 1...Qc7
      • 2.Sc2#
    • 1...Qd7
      • 2.Sc2#
    • 1...Qe7
      • 2.Sc2#
    • 1...Qf7
      • 2.Sc2#
    • 1...Qg7
      • 2.Sc2#
    • 1...Qa8
      • 2.Sc2#
    • 1...Rd4
      • 2.Sc4#
    • 1...Rc5
      • 2.Sc2#
      • 2.Sc4#
    • 1...Bh7
      • 2.Rxd5#
  • Tries
    • 1.Sd7+?
      • 1...Kd4
        • 2.Rc4#
      • 1...Qxd7
        • 2.Sc2#
      • 1...Rxd7!
    • 1.Re6+?
      • 1...Kd4
        • 2.Re4#
        • 2.Rxd5#
        • 2.Qb4#
      • 1...Bxe6!
    • 1.Re8+?
      • 1...Kd4
        • 2.Rc4#
        • 2.Re4#
        • 2.Qb4#
      • 1...Qe7
        • 2.Sc2#
      • 1...Be6!
    • 1.f4+?
      • 1...Kd4
        • 2.Sf5#
        • 2.Rc4#
      • 1...gxf4!
  • Keys
    • 1.Bg7!
      • threat
        • 2.Sd7#
      • 1...Qxe3+
        • 2.Qxe3#
      • 1...Kd4
        • 2.Sf5#
      • 1...Qxg7
        • 2.Sc2#
      • 1...Qd7
        • 2.Sc2#
        • 2.Sxd7#
      • 1...Rd7
        • 2.Sxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • K(f);N_PINS(C),P_SPINR(e),S_FLIGHT::S(C)
    • Q(h);CHECK,OGATE,P_SPINQ(h),XS(C)::QAR2(A),XQ(h)
    • Q(h);N_PINS(C)::QAR(A)+S(C)
    • R(e);N_PINS(C)::QAR(A)+S(C),DCHECK
    • B(i);N_GUARD::R1(I),XR(e)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(f);N_PINS(C),S_FLIGHT::R1(G)
        • Q(h);N_PINS(C),XS(H)::QAR(A)+S(C)
      • Refutation
        • R(e);XS(H)
    • Try
      • R(G);CHECK
      • Refutation
        • B(i);XR(G)
    • Try
      • R(I);CHECK
      • Vars
        • Q(h);N_PINS(C),P_SPINQ(h)::QAR(A)+S(C)
      • Refutation
        • B(i);P_SPINB(i)
    • Try
      • P(D);CHECK
      • Refutation
        • P(g);XP(D)
  • Actual
    • B(J);
    • Threat
      • B(J)+S(H),DCHECK
    • Vars
      • Q(h);CHECK,OGATE,P_SPINQ(h),XS(C)::QAR2(A),XQ(h)
      • K(f);N_PINS(C),P_SPINR(e),S_FLIGHT::S(C)
      • Q(h);N_PINS(C),XB(J)::QAR(A)+S(C)
      • R(e);::B(J)+S(H),DCHECK,XR(e)
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