MESON Chess Problem Database

Problem Display
PID: 188439 (8/3Q4/N1p2R2/2PB4/3k2P1/3P4/8/3K4 w - - 0 1)

Colle, B

To Alain White, 1945

8/3Q4/N1p2R2/2PB4/3k2P1/3P4/8/3K4

#2

8 + 2

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Bh1+?
      • 1...Ke3
        • 2.Rf3#
      • 1...Ke5
        • 2.Rf5#
        • 2.Qd6#
      • 1...Kc3!
    • 1.Bg2+?
      • 1...Ke3
        • 2.Rf3#
      • 1...Ke5
        • 2.Rf5#
        • 2.Qd6#
      • 1...Kc3!
    • 1.Be4+?
      • 1...Ke3
        • 2.Rf3#
      • 1...Ke5
        • 2.Rf5#
        • 2.Qd6#
      • 1...Kc3!
    • 1.Bxc6+?
      • 1...Ke3
        • 2.Rf3#
      • 1...Ke5
        • 2.Rf5#
        • 2.Qd6#
      • 1...Kc3!
    • 1.Rf3?
      • 1...Kc3
        • 2.Qg7#
      • 1...cxd5
        • 2.Qg7#
      • 1...Ke5!
  • Keys
    • 1.Qg7!
      • 1...Kc3
        • 2.Rf3#
      • 1...Kxd3
        • 2.Rf3#
      • 1...Ke3
        • 2.Rf3#
      • 1...Kxd5
        • 2.Rd6#
      • 1...Ke5
        • 2.Rf5#
      • 1...cxd5
        • 2.Rf3#

Anticipated by 247621(1932)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(E);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(E);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(E);CHECK,XP(b)
      • Vars
        • K(a);S_FLIGHT::R1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(G);
      • Vars
        • K(a);S_FLIGHT::QAB(H)
        • P(b);P_SPINP(b),SBLOCK,XB(E)::QAB(H)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(H);
    • Vars
      • K(a);S_FLIGHT::QAB(H)+R(G)
      • K(a);P-FLIGHT,XP(B)::R(G)
      • K(a);S_FLIGHT::R1(G)
      • K(a);P-FLIGHT,XB(E)::R1(G)
      • K(a);S_FLIGHT::QAB(H)+R(G),DCHECK
      • P(b);SBLOCK,XB(E)::QAB(H)+R(G)
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