MESON Chess Problem Database

Problem Display
PID: 177999 (5R2/8/8/B3p3/1p2pp2/3PPPpN/2P5/K2QNk2 w - - 0 1)

Lider, Valentin Viktorovich

3rd Comm., Sahs (Latvia), 1986

5R2/8/8/B3p3/1p2pp2/3PPPpN/2P5/K2QNk2

#2

10 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...fxe3
      • 2.fxe4#
  • Tries
    • 1.Bxb4?
      • 1...exd3
        • 2.Qxd3#
      • 1...exf3
        • 2.Qxf3#
      • 1...fxe3
        • 2.fxe4#
      • 1...g2!
    • 1.dxe4?
      • 1...g2
        • 2.Sd3#
      • 1...b3
        • 2.Qd3#
      • 1...fxe3!
  • Keys
    • 1.fxe4!
      • 1...g2
        • 2.Sf3#
      • 1...b3
        • 2.Qf3#
      • 1...f3
        • 2.Rxf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(e);XP(F)::R(J)+P(G),XP(d)
  • Tries
    • Try
      • B(I);XP(c)
      • Vars
        • P(d);OGATE,XP(E)::QAB(B),XP(d)
        • P(d);OGATE,XP(G)::QAR2(B),XP(d)
        • P(e);XP(F)::R(J)+P(G),XP(d)
      • Refutation
        • P(b);
    • Try
      • P(E);XP(d)
      • Vars
        • P(b);SBLOCK::QAR(B)+S(C)
        • P(c);::QAB(B)
      • Refutation
        • P(e);XP(F)
  • Actual
    • P(G);P_PINP(e),XP(d)
    • Vars
      • P(b);SBLOCK::QAR(B)+S(C)
      • P(c);::QAR2(B)
      • P(e);OGATE::R(J),XP(e)
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