MESON Chess Problem Database

Problem Display
PID: 93151 (1Q6/3pp1P1/2prp3/4P3/1B1k1N2/1b1B2P1/2P2K2/8 w - - 0 1)

Westerberg, CE

Tidskrift for Schack, 1910

1Q6/3pp1P1/2prp3/4P3/1B1k1N2/1b1B2P1/2P2K2/8

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Bc3#
    • 1...Rd5
      • 2.Se2#
      • 2.c3#
  • Tries
    • 1.Bc3+?
      • 1...Kc5
        • 2.Qa7#
        • 2.Qb4#
      • 1...Kxc3!
    • 1.Qxd6+?
      • 1...Bd5
        • 2.Se2#
        • 2.c3#
      • 1...exd6!
    • 1.Qa7+?
      • 1...c5
        • 2.Qxc5#
        • 2.Qa1#
      • 1...Kxe5!
    • 1.Qb6+?
      • 1...c5
        • 2.Qxc5#
      • 1...Kxe5!
  • Keys
    • 1.Ba3!
      • 1...Kc3
        • 2.Qb4#
      • 1...Kxe5
        • 2.Bb2#
      • 1...Bxc2
        • 2.Qb2#
      • 1...Rd5
        • 2.Se2#
      • 1...Ba2
        • 2.Qb2#
      • 1...Ba4
        • 2.Qb2#
      • 1...Bc4
        • 2.Qb2#
      • 1...Bd5
        • 2.Qb2#
      • 1...c5
        • 2.Bb2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(b);P_SPINR(d),S_FLIGHT,XP(G)::B(E)
  • Tries
    • Try
      • B(E);CHECK
      • Refutation
        • K(b);S_FLIGHT,XB(E)
    • Try
      • Q(I);CHECK,XR(d)
      • Refutation
        • P(g);XQ(I)
    • Try
      • Q(I);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(G)
    • Try
      • Q(I);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAB1(I),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XP(G)
  • Actual
    • B(E);
    • Vars
      • K(b);S_FLIGHT::QAB1(I)
      • K(b);P_SPINR(d),S_FLIGHT,XP(G)::B(E)
      • B(a);OGATE,XP(A)::QAB(I)
      • R(d);SBLOCK::S(F)
      • B(a);OGATE::QAB(I)
      • P(c);SBLOCK::B(E)
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Developed and maintained by Brian Stephenson.
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