MESON Chess Problem Database

Problem Display
PID: 103461 (8/5R2/8/3K4/2p1p3/3k4/6R1/3N4 w - - 0 1)

Banaszek, Marcin

Polish Chess Federation and Gdynia-60 JT, 1987

8/5R2/8/3K4/2p1p3/3k4/6R1/3N4

#2

4 + 3

6490 yacpdb 2009
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Tries
    • 1.Rf3+?
      • 1...e3
        • 2.Rxe3#
      • 1...exf3!
    • 1.Rf4?
      • 1...e3
        • 2.Rd4#
      • 1...c3!
    • 1.Rc7?
      • 1...c3
        • 2.Rxc3#
      • 1...e3!
    • 1.Re7?
      • 1...e3
        • 2.Rxe3#
      • 1...c3!
  • Keys
    • 1.Rd7!
      • threat
        • 2.Kc5#
        • 2.Ke5#
        • 2.Kc6#
        • 2.Ke6#
      • 1...c3
        • 2.Kc5#
      • 1...e3
        • 2.Ke5#

Anticipated by 165106(1981), 212383(1986)

This anticipates 35829(1997)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • P(c);P_SPINP(c)::R1(D),XP(c)
      • Refutation
        • P(c);XR(D)
    • Try
      • R(D);
      • Vars
        • P(c);OGATE::R1(D)
      • Refutation
        • P(b);
    • Try
      • R(D);
      • Vars
        • P(b);OGATE::R1(D),XP(b)
      • Refutation
        • P(c);
    • Try
      • R(D);
      • Vars
        • P(c);OGATE::R1(D),XP(c)
      • Refutation
        • P(b);
  • Actual
    • R(D);
    • Threat
      • DUALS(4)
    • Vars
      • P(b);::R(D)+K(C)
      • P(c);::R(D)+K(C)
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