MESON Chess Problem Database

Problem Display
PID: 8161 (1Q2b3/1B4B1/1p2p3/1q2r2k/3Rp3/1p1p1N2/1Kp2NR1/2n1r3 w - - 0 1)

Lebedinets, Nikolai Grigorevich

The Problemist, 1995

1Q2b3/1B4B1/1p2p3/1q2r2k/3Rp3/1p1p1N2/1Kp2NR1/2n1r3

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Qxe5#
    • 1...Qc4
      • 2.Qxe5#
      • 2.Qxe8#
    • 1...Qa6
      • 2.Qxe5#
      • 2.Qxe8#
    • 1...Qc6
      • 2.Qxe5#
    • 1...Qd7
      • 2.Qxe5#
    • 1...Qb4
      • 2.Qxe5#
      • 2.Qxe8#
    • 1...Qa5
      • 2.Qxe8#
    • 1...Qc5
      • 2.Qxe8#
    • 1...Qd5
      • 2.Qxe8#
    • 1...Rc5
      • 2.Qh2#
    • 1...Rd5
      • 2.Qh2#
    • 1...Rf5
      • 2.Qh2#
    • 1...Bc6
      • 2.Qh8#
    • 1...Bg6
      • 2.Rh2#
    • 1...Bd7
      • 2.Qh8#
    • 1...Bf7
      • 2.Qh8#
    • 1...exf3
      • 2.Bxf3#
    • 1...e3
      • 2.Rh4#
  • Tries
    • 1.Bc6?
      • threat
        • 2.Qxe8#
      • 1...Qxc6
        • 2.Qxe5#
      • 1...Bxc6
        • 2.Qh8#
      • 1...Rf5
        • 2.Qh2#
      • 1...Bg6
        • 2.Rh2#
      • 1...Bd7
        • 2.Qh8#
      • 1...Bf7
        • 2.Qh8#
      • 1...Rg5!
    • 1.Rd5?
      • threat
        • 2.Qxe5#
      • 1...Qxd5
        • 2.Qxe8#
      • 1...Rxd5
        • 2.Qh2#
      • 1...Rg5
        • 2.Rgxg5#
      • 1...Rf5
        • 2.Qh2#
      • 1...Bg6
        • 2.Rh2#
      • 1...exf3!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Qxe5#
      • 1...Qxd5
        • 2.Qxe8#
      • 1...Rxd5
        • 2.Qh2#
      • 1...exf3
        • 2.Bxf3#
      • 1...Rg5
        • 2.Rxg5#
      • 1...Rf5
        • 2.Qh2#
      • 1...Bg6
        • 2.Rh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • Q(g);N_GUARD::QAR(H),XR(h)
    • Q(g);N_GUARD,SBLOCK::QAB(H),XB(l)
    • Q(g);N_GUARD::QAB(H),XB(l)
    • R(h);OGATE::QAR(H)
    • B(l);OGATE::QAR(H)
    • B(l);SBLOCK::R(C)
    • P(f);OGATE,XS(D)::B(F),XP(f)
    • P(f);OGATE::R1(E)
  • Tries
    • Try
      • B(F);
      • Threat
        • QAB(H),XB(l)
      • Vars
        • Q(g);N_GUARD,XB(F)::QAR(H),XR(h)
        • B(l);OGATE,XB(F)::QAR(H)
        • R(h);OGATE::QAR(H)
        • B(l);SBLOCK::R(C)
        • B(l);OGATE::QAR(H)
      • Refutation
        • R(h);
    • Try
      • R(E);P_PINR(h)
      • Threat
        • QAR(H),XR(h)
      • Vars
        • Q(g);N_GUARD,N_SPINR(h),XR(E)::QAB(H),XB(l)
        • R(h);N_SPINR(h),OGATE,XR(E)::QAR(H)
        • R(h);N_GUARD::R1(C),XR(h)
        • R(h);OGATE::QAR(H)
        • B(l);SBLOCK::R(C)
      • Refutation
        • P(f);XS(D)
  • Actual
    • B(F);
    • Threat
      • QAR(H),XR(h)
    • Vars
      • Q(g);N_GUARD,XB(F)::QAB(H),XB(l)
      • R(h);OGATE,XB(F)::QAR(H)
      • P(f);OGATE,XS(D)::B(F),XP(f)
      • R(h);N_GUARD::R1(C),XR(h)
      • R(h);OGATE::QAR(H)
      • B(l);SBLOCK::R(C)
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