MESON Chess Problem Database

Problem Display
PID: 178563 (8/8/8/pQ6/r2N1B2/2kp1K2/2P5/8 w - - 0 1)

Wrobel, Marian

2nd Prize, Norsk Vanforetidsskrift, 1951

8/8/8/pQ6/r2N1B2/2kp1K2/2P5/8

#2

5 + 4

78 Bulletin Ouvrier des Echecs 1952
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Be5#
    • 1...Rxd4
      • 2.Qb3#
    • 1...dxc2
      • 2.Se2#
  • Tries
    • 1.Bd2+?
      • 1...Kxd4
        • 2.c3#
      • 1...Kxd2!
    • 1.Qxd3+?
      • 1...Kb4
        • 2.Bd6#
      • 1...Kb2!
  • Keys
    • 1.Bc1!
      • 1...Kxd4
        • 2.Bb2#
      • 1...Rxd4
        • 2.Qb3#
      • 1...dxc2
        • 2.Se2#
      • 1...Ra1
        • 2.Qc5#
      • 1...Ra2
        • 2.Qc5#
      • 1...Ra3
        • 2.Qc5#
      • 1...Rb4
        • 2.Qxd3#
      • 1...Rc4
        • 2.Qb2#
      • 1...d2
        • 2.Bb2#

This anticipates 107680(1968)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,S_FLIGHT,XS(C)::B(D)
    • R(c);SBLOCK,XS(C)::QAR1(E)
    • P(b);N_GUARD,SBLOCK,XP(A)::S(C)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(C)::P(A)
      • Refutation
        • K(a);S_FLIGHT,XB(D)
    • Try
      • Q(E);CHECK,XP(b)
      • Vars
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(D);
    • Vars
      • K(a);S_FLIGHT,XS(C)::B(D)
      • R(c);SBLOCK,XS(C)::QAR1(E)
      • P(b);N_GUARD,SBLOCK,XP(A)::S(C)
      • R(c);N_GUARD::QAR2(E)
      • R(c);SBLOCK::QAR1(E),XP(b)
      • R(c);SBLOCK::QAB1(E)
      • P(b);SBLOCK::B(D)
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