MESON Chess Problem Database

Problem Display
PID: 10437 (8/4R3/ppn5/4bQ2/1P1k4/K2B2P1/8/8 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

Sachove umeni (Ceskoslovensky sach), 1964

8/4R3/ppn5/4bQ2/1P1k4/K2B2P1/8/8

#2

6 + 5

2988 Izbrannie Kompozitsi 1985
3310 2345 Chess Problems 1997
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Rd7#
  • Tries
    • 1.Be2?
      • threat
        • 2.Qd3#
      • 1...Kc3
        • 2.Qd3#
      • 1...Kd5
        • 2.Rd7#
      • 1...Sxb4
        • 2.Qxe5#
      • 1...Ke3!
    • 1.Bb5?
      • threat
        • 2.Qd3#
      • 1...Kc3
        • 2.Qd3#
      • 1...Ke3
        • 2.Qf4#
      • 1...Kd5
        • 2.Rd7#
      • 1...Sxb4
        • 2.Qxe5#
      • 1...axb5!
    • 1.Bxa6?
      • threat
        • 2.Qd3#
      • 1...Kc3
        • 2.Qd3#
      • 1...Ke3
        • 2.Qf4#
      • 1...Kd5
        • 2.Rd7#
      • 1...Sxb4
        • 2.Qxe5#
      • 1...b5!
  • Keys
    • 1.Bf1!
      • threat
        • 2.Qd3#
      • 1...Kc3
        • 2.Qd3#
      • 1...Ke3
        • 2.Qf4#
      • 1...Kd5
        • 2.Rd7#
      • 1...Sxb4
        • 2.Qxe5#

This anticipates 96299(1982)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,P_SPINB(b)::R(F)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
        • K(a);P-FLIGHT,P_SPINB(b)::R(F)
        • S(e);N_GUARD,XP(D)::QAB1(E),XB(b)
      • Refutation
        • K(a);P_SPINB(b),S_FLIGHT
    • Try
      • B(B);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
        • K(a);P_SPINB(b),S_FLIGHT::QAB1(E)
        • K(a);P-FLIGHT,P_SPINB(b)::R(F)
        • S(e);N_GUARD,XP(D)::QAB1(E),XB(b)
      • Refutation
        • P(c);XB(B)
    • Try
      • B(B);XP(c)
      • Threat
        • QAR1(E)
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
        • K(a);P_SPINB(b),S_FLIGHT::QAB1(E)
        • K(a);P-FLIGHT,P_SPINB(b)::R(F)
        • S(e);N_GUARD,XP(D)::QAB1(E),XB(b)
      • Refutation
        • P(d);
  • Actual
    • B(B);
    • Threat
      • QAR1(E)
    • Vars
      • K(a);S_FLIGHT::QAR1(E)
      • K(a);P_SPINB(b),S_FLIGHT::QAB1(E)
      • K(a);P-FLIGHT,P_SPINB(b)::R(F)
      • S(e);N_GUARD,XP(D)::QAB1(E),XB(b)
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