MESON Chess Problem Database

Problem Display
PID: 86951 (2n2Qb1/b1rP2p1/8/1PNk3r/1R3B2/5K1p/2P5/8 w - - 0 1)

Avramenko, Nikolai

Marandiuk, Mikhail Nazarovich

Buletin Problemistic, 1971

2n2Qb1/b1rP2p1/8/1PNk3r/1R3B2/5K1p/2P5/8

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.Qf5#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rh6
      • 2.Qf5#
    • 1...Rh7
      • 2.Qf5#
    • 1...Rh8
      • 2.Qf5#
    • 1...Rxc5
      • 2.Qxg8#
    • 1...Bxc5
      • 2.Qxg8#
    • 1...Sb6
      • 2.Qd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...g5
      • 2.Qf5#
  • Tries
    • 1.Re4?
      • threat
        • 2.c4#
      • 1...Rxc5
        • 2.Qxg8#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sb6
        • 2.Qd6#
      • 1...Se7!
    • 1.Qf6?
      • threat
        • 2.Qd4#
      • 1...Kxc5
        • 2.Qd4#
      • 1...Rxc5
        • 2.Rd4#
      • 1...Bxc5
        • 2.c4#
      • 1...Re5
        • 2.Qxe5#
      • 1...gxf6!
    • 1.c3?
      • threat
        • 2.Rd4#
      • 1...Rxc5
        • 2.Qxg8#
      • 1...Bxc5
        • 2.Qxg8#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Se7!
    • 1.d8Q+?
      • 1...Sd6
        • 2.Qfxd6#
        • 2.Qdxd6#
      • 1...Rd7!
    • 1.d8R+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Rd7!
  • Keys
    • 1.Qxg7!
      • threat
        • 2.Qd4#
      • 1...Kxc5
        • 2.Qd4#
      • 1...Rxc5
        • 2.Qxg8#
      • 1...Bxc5
        • 2.Qxg8#
      • 1...Re5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(c);N_GUARD::QAR2(H)
    • R(c);N_GUARD,P_PINB(D)::QAR2(H),XR(c)
    • R(e);SBLOCK,XS(F)::QAB(H),XB(h)
    • B(d);SBLOCK,XS(F)::QAB(H),XB(h)
    • S(g);N_GUARD::QAR1(H)
    • S(g);N_GUARD::QAR1(H),XS(g)
    • P(f);S_CUTR(c)::QAR2(H)
  • Tries
    • Try
      • R(C);
      • Threat
        • P(A)
      • Vars
        • R(e);SBLOCK,XS(F)::QAB(H),XB(h)
        • S(g);N_GUARD::QAR1(H),XS(g)
        • S(g);N_GUARD::QAR1(H)
      • Refutation
        • S(g);
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • K(b);P-FLIGHT,XS(F)::QAB1(H)
        • R(e);SBLOCK,XS(F)::R1(C)
        • B(d);SBLOCK,XS(F)::P(A)
        • R(c);N_GUARD::QAR1(H),XR(c)
      • Refutation
        • P(f);XQ(H)
    • Try
      • P(A);
      • Threat
        • R1(C)
      • Vars
        • R(e);SBLOCK,XS(F)::QAB(H),XB(h)
        • B(d);SBLOCK,XS(F)::QAB(H),XB(h)
        • S(g);N_GUARD::QAR1(H),XS(g)
      • Refutation
        • S(g);
    • Try
      • P(G);CHECK
      • Refutation
        • R(e);P_SPINR(e)
    • Try
      • P(G);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAR1(H),XS(g)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • Q(H);XP(f)
    • Threat
      • QAR1(H)
    • Vars
      • K(b);P-FLIGHT,XS(F)::QAB1(H)
      • R(e);SBLOCK,XS(F)::QAB(H),XB(h)
      • B(d);SBLOCK,XS(F)::QAB(H),XB(h)
      • R(c);N_GUARD::QAR1(H),XR(c)
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