MESON Chess Problem Database

Problem Display
PID: 149737 (6Q1/3N4/3p3r/K1PN3p/npk1P2R/4p3/P2RP3/3nbB2 w - - 0 1)

Einat, Paz

1/2 Prize, The Problemist, 2013

6Q1/3N4/3p3r/K1PN3p/npk1P2R/4p3/P2RP3/3nbB2

#2

11 + 9

56 The Problemist 2015
23 Die Schwalbe 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd2
      • 2.e5#
    • 1...Sdc3
      • 2.Sxe3#
      • 2.S5b6#
    • 1...Sac3
      • 2.Sxe3#
      • 2.S5b6#
    • 1...Sxc5
      • 2.S7b6#
    • 1...exd2
      • 2.e3#
    • 1...dxc5
      • 2.Se5#
  • Tries
    • 1.Se5+?
      • 1...Kxc5
        • 2.Qc8#
      • 1...dxe5!
    • 1.S7b6+?
      • 1...Kxc5
        • 2.Qc8#
      • 1...Sxb6!
    • 1.Qc8?
      • threat
        • 2.Qa6#
      • 1...Sxc5
        • 2.S7b6#
      • 1...exd2
        • 2.e3#
      • 1...dxc5
        • 2.Se5#
      • 1...Sdc3
        • 2.Sxe3#
      • 1...Sac3
        • 2.S5b6#
        • 2.S7b6#
        • 2.cxd6#
      • 1...Bxd2!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qa6#
      • 1...Bxd2
        • 2.e5#
      • 1...Sxc5
        • 2.S7b6#
      • 1...exd2
        • 2.e3#
      • 1...dxc5
        • 2.Se5#
      • 1...Sdc3
        • 2.Sxe3#
      • 1...Sac3
        • 2.S5b6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD,XR(C)::R(F)+P(E)
    • S(d);N_GUARD,SBLOCK,XP(H)::S(J)
    • P(c);OGATE,XR(C)::B(A)+P(D)
    • P(h);N_GUARD,SBLOCK,XP(H)::S(J)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(f);P-FLIGHT,XP(H)::QAR(K)
      • Refutation
        • P(h);XS(J)
    • Try
      • S(J);CHECK
      • Vars
        • K(f);P-FLIGHT,XP(H)::QAR(K)
      • Refutation
        • S(d);XS(J)
    • Try
      • Q(K);
      • Threat
        • QAB(K)
      • Vars
        • S(d);N_GUARD,P_SPINS(d),XP(H)::S(J)
        • P(c);OGATE,XR(C)::B(A)+P(D)
        • P(h);N_GUARD,P_SPINP(h),XP(H)::S(J)
        • S(a);N_GUARD,SBLOCK::S(I),XP(c)
      • Refutation
        • B(b);XR(C)
  • Actual
    • Q(K);
    • Threat
      • QAB(K)
    • Vars
      • B(b);N_GUARD,XR(C)::R(F)+P(E)
      • S(d);N_GUARD,SBLOCK,XP(H)::S(J)
      • P(c);OGATE,XR(C)::B(A)+P(D)
      • P(h);N_GUARD,SBLOCK,XP(H)::S(J)
      • S(a);N_GUARD,SBLOCK::S(I),XP(c)
      • S(d);N_GUARD,SBLOCK::S(I)
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Developed and maintained by Brian Stephenson.
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