MESON Chess Problem Database

Problem Display
PID: 86940 (2b5/8/3p1p2/1R2p2n/K1B1kB2/3R4/8/b2N1Qn1 w - - 0 1)

Vlasenko, Nikolai Fillipovich

Original, 1975

2b5/8/3p1p2/1R2p2n/K1B1kB2/3R4/8/b2N1Qn1

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Bd5#
    • 1...exf4
      • 2.Sf2#
    • 1...f5
      • 2.Bd5#
  • Tries
    • 1.Re3+?
      • 1...Kd4
        • 2.Rd5#
        • 2.Qd3#
      • 1...Kf5!
    • 1.Rd4+?
      • 1...Kxd4
        • 2.Qd3#
      • 1...Bxd4
        • 2.Bd3#
      • 1...exd4
        • 2.Bd3#
      • 1...Kf5!
  • Keys
    • 1.Bxe5!
      • threat
        • 2.Re3#
      • 1...Bxe5
        • 2.Bd5#
      • 1...dxe5
        • 2.Bd5#
      • 1...fxe5
        • 2.Bd5#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Bd4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • B(h);SBLOCK::B(E)
    • P(d);SBLOCK,XB(F)::S(A)
    • P(g);SBLOCK::B(E)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(c);P-FLIGHT,XR(C)::QAR1(B)
        • B(a);SBLOCK,XR(C)::B(E)
        • P(d);SBLOCK,XR(C)::B(E)
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT
  • Actual
    • B(F);XP(d)
    • Threat
      • R1(C)
    • Vars
      • B(a);SBLOCK,XB(F)::B(E)
      • P(f);SBLOCK,XB(F)::B(E)
      • P(g);SBLOCK,XB(F)::B(E)
      • S(b);N_GUARD::QAB1(B),XS(b)
      • S(e);N_GUARD::QAR1(B),XS(e)
      • B(a);N_GUARD::R1(C),XB(a)
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