MESON Chess Problem Database

Problem Display
PID: 166015 (8/4R1Q1/4Prp1/1P1k2P1/1B3P2/2P2N1q/b2K1NB1/8 w - - 0 1)

Bourd, Evgeny

Grinblat, Arieh

2nd Place, Ostrada Quick Ty., 2015

8/4R1Q1/4Prp1/1P1k2P1/1B3P2/2P2N1q/b2K1NB1/8

#2

12 + 5

145 StrateGems 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Se5#
    • 1...Qh4
      • 2.Se5#
    • 1...Qh6
      • 2.Se5#
    • 1...Qh7
      • 2.Se5#
    • 1...Qh8
      • 2.Se5#
    • 1...Rf5
      • 2.Qd4#
    • 1...Rxe6
      • 2.Qd4#
    • 1...Rf7
      • 2.Qd4#
    • 1...Rf8
      • 2.Qd4#
  • Tries
    • 1.Se5+?
      • 1...Qf3
        • 2.Bxf3#
      • 1...Qxg2!
    • 1.Rd7+?
      • 1...Kxe6
        • 2.Sd4#
      • 1...Kc4!
    • 1.Qxf6?
      • threat
        • 2.Qd4#
      • 1...Qh8
        • 2.Se5#
      • 1...Kc4!
  • Keys
    • 1.Rc7!
      • threat
        • 2.Qd7#
      • 1...Kxe6
        • 2.Sd4#
        • 2.Qd7#
      • 1...Qxe6
        • 2.Se5#
      • 1...Rxe6
        • 2.Qd4#
      • 1...Qh7
        • 2.Sd4#
      • 1...Rf7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(b);N_GUARD,XP(J)::B(C)+S(E)
    • Q(b);N_GUARD::B(C)+S(E)
    • R(d);OGATE::QAR1(L)
    • R(d);OGATE,XP(J)::QAR1(L)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::B(C),XQ(b)
      • Refutation
        • Q(b);P_PINS(B),XB(C)
    • Try
      • R(K);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(J)::S(E)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(L);XR(d)
      • Threat
        • QAR1(L)
      • Vars
        • Q(b);N_GUARD::B(C)+S(E)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(K);
    • Threat
      • QAR2(L)
    • Vars
      • Q(b);N_GUARD,SBLOCK,XP(J)::B(C)+S(E)
      • R(d);OGATE,SBLOCK,XP(J)::QAR1(L)
      • Q(b);N_GUARD::B(C)+S(E)
      • R(d);OGATE::QAR1(L)
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