MESON Chess Problem Database

Problem Display
PID: 107764 (2K5/1pP5/4Q3/1P1N1P2/2kP4/p1qR1p2/b1P1B3/8 w - - 0 1)

Bourd, Evgeny

Comm.=, Wola Gulowska, 2005

2K5/1pP5/4Q3/1P1N1P2/2kP4/p1qR1p2/b1P1B3/8

#2

10 + 6

15345 Wola Gulowska Award 2005
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Sc3#
    • 1...Qxd4
      • 2.Rc3#
    • 1...b6
      • 2.Qc6#
  • Tries
    • 1.Kxb7?
      • threat
        • 2.Qc6#
      • 1...Kxb5
        • 2.Qa6#
      • 1...Qxd4
        • 2.Rc3#
      • 1...Qb4
        • 2.Sc3#
      • 1...Qxd3!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qc5#
      • 1...Kxd5
        • 2.Qe6#
      • 1...Qxd4
        • 2.Rxd4#
      • 1...Qb4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(c);SBLOCK::QAB(H)+S(F)
    • Q(c);SBLOCK,XP(D)::B(B)+R(C),DCHECK
    • P(f);N_GUARD::QAR2(H)
  • Tries
    • Try
      • K(J);S_FLIGHT,XP(f)
      • Threat
        • QAR2(H)
      • Vars
        • K(e);OGATEB,S_FLIGHT,XP(E)::QAB1(H)
        • Q(c);SBLOCK,XP(D)::B(B)+R(C),DCHECK
        • Q(c);P_PINP(E),SBLOCK::QAB(H)+S(F)
      • Refutation
        • Q(c);P_SPINQ(c),XR(C)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H)
    • Vars
      • K(e);OGATEB,P_PINP(I),S_FLIGHT,XS(F)::QAB1(H)
      • Q(c);OGATE,XP(D)::B(B)+R(C),DCHECK,XQ(c)
      • Q(c);SBLOCK::S(F)
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