MESON Chess Problem Database

Problem Display
PID: 63408 (4QR2/2Np4/n3p2B/2P3r1/8/1BK1k3/6p1/8 w - - 0 1)

Kapralos, Demetrius N

Hlas l'udu, 1971

4QR2/2Np4/n3p2B/2P3r1/8/1BK1k3/6p1/8

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Qxe5#
    • 1...d5
      • 2.Qxe6#
    • 1...d6
      • 2.Qxe6#
  • Tries
    • 1.Qh5?
      • threat
        • 2.Qf3#
      • 1...Ke4
        • 2.Qe2#
      • 1...g1S!
    • 1.Qxd7?
      • threat
        • 2.Qxe6#
        • 2.Qd3#
      • 1...Ke2
        • 2.Qd2#
      • 1...Ke4
        • 2.Qd4#
      • 1...Sxc7
        • 2.Qd3#
      • 1...Sb4
        • 2.Qxe6#
      • 1...e5
        • 2.Qd3#
      • 1...Sxc5!
    • 1.Qf7?
      • threat
        • 2.Qf3#
      • 1...Ke2
        • 2.Qf2#
      • 1...Ke4
        • 2.Qf4#
      • 1...g1S!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Sd4#
        • 2.Sxg5#
        • 2.Sc7#
        • 2.Sg7#
        • 2.Sd8#
      • 1...Ke2
        • 2.Sd4#
        • 2.Sxg5#
      • 1...Ke4
        • 2.Sxg5#
      • 1...Sxc5
        • 2.Sxc5#
      • 1...dxe6
        • 2.Qxe6#
      • 1...Sc7
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • P(e);OGATE::QAR2(F),XP(e)
    • P(f);N_GUARD::QAR(F),XP(e)
  • Tries
    • Try
      • Q(F);N_PINP(e)
      • Threat
        • QAR1(F)
      • Vars
        • K(b);N_SPINR(c),P-FLIGHT::QAR2(F)
      • Refutation
        • P(a);
    • Try
      • Q(F);N_PINP(e),XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);N_SPINR(c),P-FLIGHT::QAR1(F)
        • S(d);XS(E)::QAR1(F)
        • S(d);::QAR(F),XP(e)
        • P(e);::QAR1(F)
      • Refutation
        • S(d);XP(C)
    • Try
      • Q(F);N_PINP(e)
      • Threat
        • QAR1(F)
      • Vars
        • K(b);N_SPINR(c),P-FLIGHT::QAR1(F)
      • Refutation
        • P(a);
  • Actual
    • S(E);XP(e)
    • Threat
      • DUALS(5)
    • Vars
      • K(b);N_SPINR(c),P-FLIGHT::QAR(F)+S(E),DCHECK,XR(c)
      • S(d);XP(C)::QAR(F)+S(E),XS(d)
      • P(f);OGATE,P_SPINP(f),XS(E)::QAR(F),XP(f)
      • S(d);::QAR(F)+S(E),XS(d)
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Developed and maintained by Brian Stephenson.
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