MESON Chess Problem Database

Problem Display
PID: 87683 (7B/1n1N4/7R/1b1k1B2/4R3/8/3N4/K5b1 w - - 0 1)

Mortimer, L

American Chess Problemist, 1950

7B/1n1N4/7R/1b1k1B2/4R3/8/3N4/K5b1

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Rd4#
    • 1...Bd4+
      • 2.Rxd4#
    • 1...Sc5
      • 2.Sb6#
  • Tries
    • 1.Sb6+?
      • 1...Kc5
        • 2.Sb3#
      • 1...Bxb6!
    • 1.Bb2?
      • threat
        • 2.Re5#
      • 1...Bh2
        • 2.Rd4#
      • 1...Bd4
        • 2.Rxd4#
      • 1...Sd6!
    • 1.Bc3?
      • threat
        • 2.Re5#
      • 1...Bh2
        • 2.Rd4#
      • 1...Bd4
        • 2.Rxd4#
      • 1...Sd6!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Be4#
      • 1...Bd4+
        • 2.Rxd4#
      • 1...Sc5
        • 2.Sb6#
      • 1...Sd6
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::R1(C)
    • B(a);CHECK,N_GUARD::R1(C),XB(a)
    • S(d);SBLOCK,S_CUTB(a)::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT::S(B)
      • Refutation
        • B(a);XS(F)
    • Try
      • B(G);
      • Threat
        • R1(C)
      • Vars
        • B(a);N_GUARD::R1(C)
        • B(a);N_GUARD,P_PINB(G)::R1(C),XB(a)
      • Refutation
        • S(d);
    • Try
      • B(G);
      • Threat
        • R1(C)
      • Vars
        • B(a);N_GUARD::R1(C)
        • B(a);N_GUARD,P_PINB(G)::R1(C),XB(a)
      • Refutation
        • S(d);
  • Actual
    • R(C);
    • Threat
      • B(D)
    • Vars
      • B(a);CHECK,N_GUARD::R1(C),XB(a)
      • S(d);S_CUTB(a)::S(F)
      • S(d);SBLOCK::B(D)
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