MESON Chess Problem Database

Problem Display
PID: 132683 (r7/3QnN2/1B4p1/p1npP3/2PkP3/p3N3/1p1K4/1B6 w - - 0 1)

Retter, Yosef

6th Place, Liga Problemista, 2004/1

r7/3QnN2/1B4p1/p1npP3/2PkP3/p3N3/1p1K4/1B6

#2

9 + 9

14475 Mat Plus Review 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.Qxd5#
    • 1...Sc6
      • 2.Qxd5#
    • 1...Sc8
      • 2.Qxd5#
    • 1...Sg8
      • 2.Qxd5#
  • Tries
    • 1.Sc2+?
      • 1...Kxe4
        • 2.Qg4#
      • 1...Kxc4!
    • 1.Qa4?
      • threat
        • 2.cxd5#
      • 1...dxc4
        • 2.Qxc4#
      • 1...dxe4
        • 2.Sc2#
      • 1...Sc6!
    • 1.Qc6?
      • threat
        • 2.Bxc5#
        • 2.Qxc5#
      • 1...Rc8
        • 2.Bxc5#
      • 1...Sxc6!
    • 1.Qc7?
      • threat
        • 2.Bxc5#
        • 2.Qxc5#
      • 1...Rc8
        • 2.Bxc5#
      • 1...Sc6!
    • 1.cxd5?
      • threat
        • 2.Qa4#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Sc6
        • 2.dxc6#
      • 1...a4!
    • 1.exd5?
      • threat
        • 2.Qg4#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Sf5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.exd5#
      • 1...dxc4
        • 2.Sc2#
      • 1...dxe4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(h);N_GUARD::QAR1(H),XP(f)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);N_SPINP(f),N_SPINS(e),P-FLIGHT,XP(E)::QAR2(H)
      • Refutation
        • K(c);N_SPINP(f),N_SPINS(e),P-FLIGHT,XP(D)
    • Try
      • Q(H);N_PINP(f)
      • Threat
        • QAR(H)+P(D),XP(f)
      • Vars
        • P(f);OGATE,P_SPINP(f),XP(D)::QAR1(H),XP(f)
        • P(f);SBLOCK,XP(E)::S(C)
      • Refutation
        • S(h);
    • Try
      • Q(H);N_PINP(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(i);::B(G),XS(e)
      • Refutation
        • S(h);XQ(H)
    • Try
      • Q(H);N_PINP(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(i);::B(G),XS(e)
      • Refutation
        • S(h);
    • Try
      • P(D);XP(f)
      • Threat
        • QAR(H)
      • Vars
        • S(h);OGATE,XP(D)::QAR1(H),XS(h)
        • S(h);OGATE::QAR(H)+P(D),XS(h)
      • Refutation
        • P(d);
    • Try
      • P(E);XP(f)
      • Threat
        • QAR(H)
      • Vars
        • S(h);OGATE,XP(E)::QAR1(H),XS(h)
      • Refutation
        • S(h);
  • Actual
    • Q(H);N_PINP(f)
    • Threat
      • QAR(H)+P(E),XP(f)
    • Vars
      • P(f);SBLOCK,XP(D)::S(C)
      • P(f);OGATE,P_SPINP(f),XP(E)::QAR1(H),XP(f)
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