MESON Chess Problem Database

Problem Display
PID: 2421 (8/8/2B4p/2B5/R3rk1K/4Rb2/8/6Q1 w - - 0 1)

Julien, Denis

Source?, 0000

8/8/2B4p/2B5/R3rk1K/4Rb2/8/6Q1

#2

6 + 4

1679 American Chess Nuts 1868

SOLUTION

  • SOUND
  • Sets
    • 1...h5
      • 2.Qg5#
  • Tries
    • 1.Bd7?
      • threat
        • 2.Bd6#
        • 2.Qh2#
        • 2.Qg3#
      • 1...Rd4
        • 2.Bd6#
      • 1...Bg2
        • 2.Bd6#
        • 2.Qh2#
      • 1...Ke5+!
    • 1.Raxe4+?
      • 1...Kf5
        • 2.Rxf3#
      • 1...Bxe4!
  • Keys
    • 1.Rxf3+!
      • 1...Kxf3+
        • 2.Qg4#
      • 1...Ke5+
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::QAB1(A)
  • Tries
    • Try
      • B(F);
      • Threat
        • DUALS(3)
      • Vars
        • R(b);::B(E)
      • Refutation
        • K(c);CHECK,S_FLIGHT
    • Try
      • R(C);CHECK,XR(b)
      • Vars
        • K(c);P-FLIGHT::R(B),XB(a)
      • Refutation
        • B(a);XR(C)
  • Actual
    • R(B);CHECK,XB(a)
    • Vars
      • K(c);CHECK,P-FLIGHT,XR(B)::QAB1(A)
      • K(c);CHECK,N_SPINR(b),S_FLIGHT::R1(C),XR(b)
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