MESON Chess Problem Database

Problem Display
PID: 156662 (8/7p/7P/6pR/6p1/8/5P1P/5K1k w - - 0 1)

Fomichev, Evgeny Vasilevich

Best Problems, 2007

8/7p/7P/6pR/6p1/8/5P1P/5K1k

#2

5 + 4

5454 Near Snap 2016
3713 Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...g3
      • 2.hxg3#
  • Tries
    • 1.Rh3?
      • 1...g3
        • 2.hxg3#
      • 1...gxh3!
    • 1.Rxg5?
      • 1...Kxh2
        • 2.Rh5#
      • 1...g3!
    • 1.f3?
      • 1...g3
        • 2.hxg3#
      • 1...gxf3!
    • 1.h3?
      • threat
        • 2.hxg4#
      • 1...Kh2
        • 2.hxg4#
      • 1...gxh3
        • 2.Rxh3#
      • 1...g3!
  • Keys
    • 1.h4!
      • threat
        • 2.hxg5#
      • 1...Kh2
        • 2.hxg5#
      • 1...gxh4
        • 2.Rxh4#
      • 1...gxh4 ep
        • 2.Rxh3#

Anticipated by 119047(1904), 225332(2003)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(b);OGATE::R(D)+P(C),XP(b)
  • Tries
    • Try
      • R(D);
      • Vars
        • P(b);OGATE::R(D)+P(C),XP(b)
      • Refutation
        • P(b);XR(D)
    • Try
      • R(D);XP(c)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(C)::R(D)
      • Refutation
        • P(b);
    • Try
      • P(B);
      • Vars
        • P(b);OGATE::R(D)+P(C),XP(b)
      • Refutation
        • P(b);XP(B)
    • Try
      • P(C);
      • Threat
        • R(D)+P(C),XP(b)
      • Vars
        • K(a);P-FLIGHT::R(D)+P(C),XP(b)
        • P(b);OGATE,P_SPINP(b),XP(C)::R(D),XP(b)
      • Refutation
        • P(b);
  • Actual
    • P(C);
    • Threat
      • R(D)+P(C),XP(c)
    • Vars
      • K(a);P-FLIGHT::R(D)+P(C),XP(c)
      • P(c);OGATE,P_SPINP(c),XP(C)::R(D),XP(c)
      • P(b);EP,OGATE,P_SPINP(b),XP(C)::R(D),XP(b)
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