MESON Chess Problem Database

Problem Display
PID: 145696 (B7/B2RQN2/1N6/3q1p2/Rr1k1pp1/3pnb2/1P1b2P1/1K6 w - - 0 1)

Kovacevic, Marjan

1st Prize, Die Schwalbe, 2011

B7/B2RQN2/1N6/3q1p2/Rr1k1pp1/3pnb2/1P1b2P1/1K6

#2

10 + 10

23 Die Schwalbe 2013
56 The Problemist 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Qe5#
    • 1...Qxd7
      • 2.Qe5#
    • 1...Rc4
      • 2.Sxc4#
      • 2.Sxd5#
      • 2.Sc8#
  • Tries
    • 1.Sc4+?
      • 1...Rb6
        • 2.Bxb6#
      • 1...Kxc4!
    • 1.Rxb4+?
      • 1...Sc4
        • 2.Sa4#
        • 2.Sxc4#
        • 2.Sxd5#
        • 2.Sc8#
        • 2.Rxc4#
      • 1...Bxb4!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Re7#
      • 1...Kxc5!
    • 1.Qf6+?
      • 1...Ke4
        • 2.Sg5#
        • 2.Sd6#
        • 2.Re7#
        • 2.Qe5#
      • 1...Kc5!
    • 1.b3?
      • threat
        • 2.Sxd5#
      • 1...Kc3
        • 2.Qxb4#
      • 1...Qxd7
        • 2.Qe5#
      • 1...Rxa4
        • 2.Sxa4#
      • 1...Qd6
        • 2.Qe5#
      • 1...Sc4!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sc6#
      • 1...Ke4
        • 2.Sxf3#
      • 1...Qxd7
        • 2.Sbxd7#
      • 1...Qd6
        • 2.Sc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(i);::QAB1(H)
    • Q(i);N_SPINQ(i),XR(G)::QAB1(H)
  • Tries
    • Try
      • S(E);CHECK,N_PINR(e)
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::B(F),XR(e)
      • Refutation
        • K(f);N_SPINQ(i),P-FLIGHT,P_SPINR(e),XS(E)
    • Try
      • R(D);CHECK,N_SPINP(B),XR(e)
      • Refutation
        • B(a);XR(D)
    • Try
      • Q(H);CHECK
      • Vars
        • K(f);P-FLIGHT::R(G)
      • Refutation
        • K(f);N_SPINQ(i),N_SPINR(e),S_FLIGHT,XQ(H)
    • Try
      • Q(H);CHECK
      • Refutation
        • K(f);N_SPINQ(i),N_SPINR(e),S_FLIGHT
    • Try
      • P(B);
      • Threat
        • B(F)+S(E),XQ(i)
      • Vars
        • K(f);N_SPINQ(i),N_SPINR(e),S_FLIGHT::QAB1(H),XR(e)
        • Q(i);N_SPINQ(i),XR(G)::QAB1(H)
        • R(e);N_PINP(B),N_SPINR(e),XR(D)::B(F)+S(E),XR(e)
        • Q(i);::QAB1(H)
      • Refutation
        • S(c);N_SPINR(e)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • K(f);P-FLIGHT::QAR(H)+S(I),XB(d)
      • Q(i);N_SPINQ(i),XR(G)::B(F)+S(E),XQ(i)
      • Q(i);::B(F)+S(E)
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