MESON Chess Problem Database

Problem Display
PID: 195815 (2k1N3/2P1q3/2K1P3/2p1Q3/8/8/8/8 w - - 0 1)

Neyndorff, Luke

StrateGems, 2018

2k1N3/2P1q3/2K1P3/2p1Q3/8/8/8/8

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Sd6#
    • 1...Qg5
      • 2.Sd6#
    • 1...Qd6+
      • 2.Sxd6#
    • 1...Qf6
      • 2.Sd6#
    • 1...Qxe6+
      • 2.Qxe6#
    • 1...Qxc7+
      • 2.Qxc7#
    • 1...Qd7+
      • 2.exd7#
    • 1...Qf7
      • 2.Sd6#
    • 1...Qg7
      • 2.Sd6#
    • 1...Qh7
      • 2.Sd6#
  • Keys
    • 1.Qh8!
      • threat
        • 2.Sd6#
      • 1...Qd6+
        • 2.Sxd6#
      • 1...Qxc7+
        • 2.Sxc7#
      • 1...Qd7+
        • 2.exd7#
      • 1...Qxe8+
        • 2.Qxe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(b);N_GUARD::S(E)
    • Q(b);CHECK,N_GUARD::S(E),XQ(b)
    • Q(b);N_GUARD,P_PINP(C)::S(E)
    • Q(b);CHECK,OGATE,XP(C)::QAB(A),XQ(b)
    • Q(b);CHECK,OGATE,XP(D)::QAR1(A),XQ(b)
    • Q(b);CHECK,OGATE::P(C),XQ(b)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+S(E),DCHECK
    • Vars
      • Q(b);CHECK::QAR(A)+S(E),DCHECK,XQ(b)
      • Q(b);CHECK,XP(D)::QAR(A)+S(E),XQ(b)
      • Q(b);CHECK,OGATE::P(C),XQ(b)
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::QAR2(A),XQ(b)
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Developed and maintained by Brian Stephenson.
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