MESON Chess Problem Database

Problem Display
PID: 67177 (6B1/P7/1p1r4/3b1R2/pk6/N6R/1P6/1K6 w - - 0 1)

Petrovic, Nenad

The Problemist, 1946

6B1/P7/1p1r4/3b1R2/pk6/N6R/1P6/1K6

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bh1
      • 2.Sc2#
      • 2.Rb5#
    • 1...Bg2
      • 2.Sc2#
      • 2.Rb5#
    • 1...Bb3
      • 2.Rb5#
    • 1...Bf3
      • 2.Sc2#
      • 2.Rb5#
    • 1...Bc4
      • 2.Sc2#
    • 1...Bc6
      • 2.Sc2#
    • 1...Be6
      • 2.Rb5#
    • 1...Bb7
      • 2.Sc2#
      • 2.Rb5#
    • 1...Bf7
      • 2.Rb5#
    • 1...Ba8
      • 2.Sc2#
      • 2.Rb5#
    • 1...Bxg8
      • 2.Rb5#
  • Tries
    • 1.Rxd5?
      • threat
        • 2.Rb5#
      • 1...b5
        • 2.Rxb5#
      • 1...Rxd5!
  • Keys
    • 1.Rh4+!
      • 1...Kb3
        • 2.Rf3#
      • 1...Ka5
        • 2.a8Q#
        • 2.a8R#
      • 1...Kc5
        • 2.Rc4#
      • 1...Bc4
        • 2.Rb5#
      • 1...Be4+
        • 2.Sc2#

This is a version

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • B(c);OGATE::R1(E)
    • B(c);::S(C)
    • B(c);OGATE,XB(G)::R1(E)
  • Tries
    • Try
      • R(E);XB(c)
      • Threat
        • R1(E)
      • Vars
        • P(d);::R1(E),XP(d)
      • Refutation
        • R(e);XR(E)
  • Actual
    • R(D);CHECK
    • Vars
      • K(b);P-FLIGHT,P_SPINB(c)::R(E)
      • K(b);P_SPINB(c),S_FLIGHT::P=Q
      • K(b);P_SPINB(c),S_FLIGHT::R1(D)
      • B(c);OGATE,P_SPINB(c)::R1(E)
      • B(c);CHECK,P_SPINB(c)::S(C)
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