MESON Chess Problem Database

Problem Display
PID: 64018 (3r1b2/1N2pK2/3P1PPp/1P1k1B1Q/3p4/PNpp4/b4R2/8 w - - 0 1)

Chernyavsky, Mykola Vasilovich

HM., 64 Shakhmatnoe obozrenie, 1978

3r1b2/1N2pK2/3P1PPp/1P1k1B1Q/3p4/PNpp4/b4R2/8

#2

11 + 9

3750 FIDE Album (1977-1979) 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Be6#
    • 1...Ke5
      • 2.Bxd3#
    • 1...exd6
      • 2.Bxd3#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Be4#
        • 2.Be6#
      • 1...Ke5+
        • 2.Be6#
      • 1...e6
        • 2.Be4#
        • 2.Bxe6#
      • 1...cxd2!
    • 1.Be4+?
      • 1...Kc4
        • 2.S3a5#
        • 2.S7a5#
        • 2.Qd5#
      • 1...Kxe4!
    • 1.Re2?
      • threat
        • 2.Be6#
      • 1...Kc4
        • 2.Be6#
      • 1...e6
        • 2.Bxe6#
      • 1...dxe2!
    • 1.Rf4?
      • threat
        • 2.Be6#
      • 1...Kc4
        • 2.Be6#
      • 1...e6
        • 2.Bxe6#
      • 1...Ke5!
    • 1.Qf3+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Kc4!
    • 1.Qh1+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Kc4!
    • 1.dxe7?
      • threat
        • 2.Bxd3#
      • 1...Ke5
        • 2.Bxd3#
      • 1...d2
        • 2.Bd3#
      • 1...Kc4!
  • Keys
    • 1.S3c5!
      • threat
        • 2.Be6#
      • 1...Ke5+
        • 2.Be6#
      • 1...Kc4
        • 2.Bxd3#
      • 1...e6
        • 2.Bxe6#

There are these versions: 245251

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT::B(E)
    • K(e);P-FLIGHT,P_PINS(C)::QAR(F)+B(E),XP(c)
    • P(g);N_GUARD,XP(G)::QAR(F)+B(E),XP(c)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);CHECK,P-FLIGHT::QAR(F)+B(E)
      • Refutation
        • P(b);XS(C)
    • Try
      • B(E);CHECK
      • Refutation
        • K(e);P_PINS(C),S_FLIGHT,XB(E)
    • Try
      • R(A);
      • Threat
        • QAR(F)+B(E),DCHECK
      • Vars
        • K(e);S_FLIGHT::B(E)
        • P(g);::QAR(F)+B(E),DCHECK,XP(g)
      • Refutation
        • P(c);XR(A)
    • Try
      • R(A);
      • Threat
        • QAR(F)+B(E),DCHECK
      • Vars
        • K(e);P_SPINP(d),S_FLIGHT::B(E)
        • P(g);::QAR(F)+B(E),DCHECK,XP(g)
      • Refutation
        • K(e);P-FLIGHT,P_PINS(C)
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);P-FLIGHT,P_PINS(C)::QAR1(F)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);P-FLIGHT,P_PINS(C)::QAR1(F)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • P(G);XP(g)
      • Threat
        • QAR(F)+B(E),XP(c)
      • Vars
        • K(e);P-FLIGHT,P_PINS(C)::QAR(F)+B(E),XP(c)
        • P(c);::QAR(F)+B(E)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAR(F)+B(E),DCHECK
    • Vars
      • K(e);CHECK,P-FLIGHT::QAR(F)+B(E)
      • K(e);S_FLIGHT::B(E),XP(c)
      • P(g);::QAR(F)+B(E),DCHECK,XP(g)
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