MESON Chess Problem Database

Problem Display
PID: 139959 (B7/B7/8/8/4R3/5nK1/6b1/7k w - - 0 1)

Feenstra Kuiper, Pieter

Hoekstenen, 1967

B7/B7/8/8/4R3/5nK1/6b1/7k

#2

4 + 3

5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Rxe1#
      • 2.Rh4#
    • 1...Sd2
      • 2.Rh4#
    • 1...Sd4
      • 2.Re1#
    • 1...Sh4
      • 2.Re1#
      • 2.Rxh4#
    • 1...Se5
      • 2.Re1#
      • 2.Rh4#
    • 1...Sg5
      • 2.Re1#
  • Tries
    • 1.Re1+?
      • 1...Bf1
        • 2.Bxf3#
        • 2.Rxf1#
      • 1...Sg1
        • 2.Bxg2#
        • 2.Rxg1#
      • 1...Sxe1!
    • 1.Rh4+?
      • 1...Bh3
        • 2.Bxf3#
        • 2.Rxh3#
      • 1...Sh2
        • 2.Bxg2#
        • 2.Rxh2#
      • 1...Sxh4!
  • Keys
    • 1.Re2!
      • 1...Sd4
        • 2.Re1#
      • 1...Bf1
        • 2.Rh2#
      • 1...Bh3
        • 2.Rh2#
      • 1...Se1
        • 2.Rxe1#
      • 1...Sg1
        • 2.Bxg2#
      • 1...Sd2
        • 2.Bxg2#
      • 1...Sh2
        • 2.Bxg2#
      • 1...Sh4
        • 2.Re1#
      • 1...Se5
        • 2.Bxg2#
        • 2.Re1#
      • 1...Sg5
        • 2.Bxg2#
        • 2.Re1#

Anticipated by 21913(1922)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(c);N_GUARD,S_CUTB(b)::R(B)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • S(c);P_SPINB(b),XR(B)
    • Try
      • R(B);CHECK
      • Refutation
        • S(c);P_SPINB(b),XR(B)
  • Actual
    • R(B);
    • Vars
      • S(c);N_GUARD,P_SPINB(b)::R(B)
      • B(b);OGATE,P_SPINS(c)::R1(B)
      • S(c);N_GUARD,P_SPINB(b)::R(B),XS(c)
      • S(c);OGATE,P_SPINB(b)::B(D),XB(b)
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