MESON Chess Problem Database

Problem Display
PID: 23 (3r4/1PR5/NBB5/1N6/K1kp1b1R/1p6/b3PpPq/1r3Q2 w - - 0 1)

Barulin, Mikhail Mikhailovich

Bristol Times and Mirror, 1930

3r4/1PR5/NBB5/1N6/K1kp1b1R/1p6/b3PpPq/1r3Q2

#2

11 + 9

16265 The Two-move Chess Problem in the Soviet Union 1923-1943 1943
4872 Themes-64 1957
102 Probleemblad 2002
133 The Problemist Supplement 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.e3#
    • 1...Bd6
      • 2.Rxd4#
    • 1...d3
      • 2.Bf3#
  • Tries
    • 1.Bd7+?
      • 1...Bxc7
        • 2.Rxd4#
      • 1...Kd5!
    • 1.e3+?
      • 1...d3
        • 2.Bf3#
      • 1...Rxf1!
    • 1.e4+?
      • 1...d3
        • 2.Bd5#
      • 1...Rxf1!
  • Keys
    • 1.Ba5!
      • threat
        • 2.Sa3#
      • 1...Bc1
        • 2.e3#
      • 1...Bd6
        • 2.Rxd4#
      • 1...d3
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(h);P_SPINP(g),S_CUTR(a)::QAB(A)+P(B)
    • B(h);OGATE,P_SPINP(g)::R1(E),XP(g)
    • P(g);P_SPINB(h)::R(K)+B(I)
  • Tries
    • Try
      • B(I);CHECK
      • Vars
        • B(h);OGATE,P_SPINP(g),XR(K)::R1(E),XP(g)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • P(B);CHECK
      • Vars
        • P(g);P_SPINB(h),P_SPINP(g)::R(K)+B(I)
      • Refutation
        • R(a);XQ(A)
    • Try
      • P(B);CHECK
      • Vars
        • P(g);P_SPINP(g)::R(K)+B(I),DCHECK
      • Refutation
        • R(a);XQ(A)
  • Actual
    • B(H);
    • Threat
      • S(F)
    • Vars
      • B(h);P_SPINP(g),S_CUTR(a)::QAB(A)+P(B)
      • B(h);OGATE,P_SPINP(g)::R1(E),XP(g)
      • P(g);P_SPINB(h)::R(K)+B(I)
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