MESON Chess Problem Database

Problem Display
PID: 103634 (3K4/3B4/3k4/2p1p3/1PP1PP2/8/3N4/5R2 w - - 0 1)

Langier, H

Szachy, 1980

3K4/3B4/3k4/2p1p3/1PP1PP2/8/3N4/5R2

#2

8 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sb3?
      • threat
        • 2.Rd1#
        • 2.bxc5#
      • 1...cxb4
        • 2.Rd1#
        • 2.c5#
      • 1...exf4!
    • 1.Sf3?
      • threat
        • 2.Rd1#
        • 2.fxe5#
      • 1...exf4
        • 2.Rd1#
        • 2.e5#
      • 1...cxb4!
    • 1.Rc1?
      • 1...cxb4
        • 2.c5#
      • 1...exf4!
    • 1.Re1?
      • 1...exf4
        • 2.e5#
      • 1...cxb4!
  • Keys
    • 1.Rd1!
      • threat
        • 2.Sb1#
        • 2.Sf1#
        • 2.Sb3#
        • 2.Sf3#
      • 1...cxb4
        • 2.Sb3#
      • 1...exf4
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);XP(F)
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Refutation
        • P(a);XP(C)
    • Try
      • R(A);
      • Vars
        • P(a);OGATE,XP(C)::P(D)
      • Refutation
        • P(b);XP(F)
    • Try
      • R(A);
      • Vars
        • P(b);OGATE,XP(F)::P(E)
      • Refutation
        • P(a);XP(C)
  • Actual
    • R(A);
    • Threat
      • DUALS(4)
    • Vars
      • P(a);XP(C)::R(A)+S(B)
      • P(b);XP(F)::R(A)+S(B)
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