MESON Chess Problem Database

Problem Display
PID: 163412 (4rR2/2pQRq1b/1P6/N1PPP3/2N1kPp1/2P5/3BK3/8 w - - 0 1)

Bourd, Evgeny

Sachmatija, 2004

4rR2/2pQRq1b/1P6/N1PPP3/2N1kPp1/2P5/3BK3/8

#2

13 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Rxf4#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qa4#
      • 1...Kxf4
        • 2.Qxg4#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...c6!
    • 1.Sd6+?
      • 1...Kxd5
        • 2.Qc6#
      • 1...cxd6!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Se3#
      • 1...Kxd5
        • 2.Qc6#
      • 1...Kf5
        • 2.Qc2#
      • 1...Qxd5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(d);OGATE,XP(E)::R1(M),XQ(d)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR(K)
      • Vars
        • K(a);OGATEB,P-FLIGHT,P_SPINQ(d),XP(E)::QAR1(K),XP(b)
        • Q(d);OGATE,XP(H)::QAB1(K),XQ(d)
      • Refutation
        • P(c);
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT,XP(H)::QAB1(K)
      • Refutation
        • P(c);XS(D)
  • Actual
    • Q(K);
    • Threat
      • QAR(K)+S(D)
    • Vars
      • K(a);OGATEB,S_FLIGHT,XP(H)::QAB1(K)
      • K(a);P_SPINQ(d),S_FLIGHT::QAB(K)
      • Q(d);SBLOCK,XP(H)::QAR(K)+S(D),DCHECK
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