MESON Chess Problem Database

Problem Display
PID: 224270 (1K6/p1p1N3/p1R1P3/1k2P3/n1p1B3/R1P1B3/1P2P3/8 w - - 0 1)

Robbins, Alexander Henry

A Collection of Chess Problems, 1887

1K6/p1p1N3/p1R1P3/1k2P3/n1p1B3/R1P1B3/1P2P3/8

#2

11 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Rc5#
  • Tries
    • 1.Sc8?
      • 1...Ka5
        • 2.Rc5#
      • 1...Sxb2
        • 2.Sxa7#
        • 2.Rc5#
      • 1...a5
        • 2.Sxa7#
      • 1...Sc5
        • 2.Sxa7#
        • 2.Rxc5#
      • 1...Sb6
        • 2.Sxa7#
        • 2.Rc5#
      • 1...Sxc3!
    • 1.Rc5+?
      • 1...Kb6
        • 2.Sd5#
        • 2.Sc8#
      • 1...Sxc5!
  • Keys
    • 1.Sd5!
      • 1...Ka5
        • 2.Rc5#
      • 1...Kxc6
        • 2.Sxc7#
      • 1...Sxb2
        • 2.Sxc7#
        • 2.Rc5#
      • 1...Sxc3
        • 2.Rc5#
      • 1...a5
        • 2.Sxc7#
      • 1...Sc5
        • 2.Sxc7#
        • 2.Rxc5#
      • 1...Sb6
        • 2.Sxc7#
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD,SBLOCK::R1(H)
  • Tries
    • Try
      • S(J);
      • Vars
        • K(c);P-FLIGHT,P_SPINS(a)::R(H)
        • P(d);SBLOCK::S(J),XP(e)
      • Refutation
        • S(a);XP(D)
    • Try
      • R(H);CHECK
      • Refutation
        • S(a);XR(H)
  • Actual
    • S(J);
    • Vars
      • K(c);P-FLIGHT,P_SPINS(a)::R(H)
      • K(c);S_FLIGHT,XR(H)::B(F)+S(J),XP(f)
      • S(a);N_GUARD,XP(D)::R1(H)
      • P(d);SBLOCK::S(J),XP(f)
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Developed and maintained by Brian Stephenson.
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