MESON Chess Problem Database

Problem Display
PID: 49755 (8/2pPp3/2K1P3/Q2B2P1/2pk1NR1/1p2bP2/2P1R2q/2r1r3 w - - 0 1)

Papack, Daniel

The Problemist, 2003

8/2pPp3/2K1P3/Q2B2P1/2pk1NR1/1p2bP2/2P1R2q/2r1r3

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qd2#
    • 1...Bd2
      • 2.Qxd2#
    • 1...Bf2
      • 2.Qd2#
    • 1...Bxf4
      • 2.Qd2#
  • Tries
    • 1.Sg2+?
      • 1...Ke5
        • 2.Bxc4#
      • 1...Bf4
        • 2.Qd2#
      • 1...Qf4!
    • 1.Sh3+?
      • 1...Ke5
        • 2.Bxc4#
      • 1...Bf4
        • 2.Qd2#
      • 1...Qf4!
    • 1.Sh5+?
      • 1...Ke5
        • 2.Bxc4#
      • 1...Bf4
        • 2.Qd2#
      • 1...Qf4!
    • 1.Sg6+?
      • 1...Bf4
        • 2.Qd2#
      • 1...Qf4!
    • 1.Qc5+?
      • 1...Ke5
        • 2.Bxc4#
      • 1...Kc3!
    • 1.c3+?
      • 1...Ke5
        • 2.Bxc4#
      • 1...Rxc3!
  • Keys
    • 1.d8Q!
      • threat
        • 2.Be4#
      • 1...Ke5
        • 2.Bxc4#
      • 1...Qxf4
        • 2.Qh8#
      • 1...Bxf4
        • 2.Qd2#
      • 1...Qh8
        • 2.Qxh8#
      • 1...c3
        • 2.Bxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(e);N_GUARD::QAR2(F)
    • B(e);N_GUARD::QAR2(F),XB(e)
    • B(e);N_GUARD,P_SPINB(e),XS(D)::QAR2(F)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(g);P_SPINB(e),S_FLIGHT::QAR(F)+B(G),XP(f)
        • B(e);P_SPINB(e)::QAR2(F)
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • S(D);CHECK
      • Vars
        • K(g);P_SPINB(e),S_FLIGHT::QAR(F)+B(G),XP(f)
        • B(e);P_SPINB(e)::QAR2(F)
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • S(D);CHECK
      • Vars
        • K(g);P_SPINB(e),S_FLIGHT::QAR(F)+B(G),XP(f)
        • B(e);P_SPINB(e)::QAR2(F)
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • S(D);CHECK
      • Vars
        • B(e);P_SPINB(e)::QAR2(F)
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • Q(F);CHECK
      • Vars
        • K(g);P_SPINB(e),S_FLIGHT::QAR(F)+B(G),XP(f)
      • Refutation
        • K(g);P_SPINP(f),S_FLIGHT
    • Try
      • P(A);CHECK
      • Vars
        • K(g);P_SPINB(e),S_FLIGHT::QAR(F)+B(G),XP(f)
      • Refutation
        • R(a);XP(A)
  • Actual
    • P(K);
    • Threat
      • QAR(K)+B(G)
    • Vars
      • K(g);P_SPINB(e),S_FLIGHT::QAR(F)+B(G),XP(f)
      • Q(c);N_GUARD,P_SPINQ(c),XS(D)::QAB(K)
      • B(e);N_GUARD,P_SPINB(e),XS(D)::QAR2(F)
      • Q(c);N_GUARD::QAB(K),XQ(c)
      • P(f);OGATE::QAR(K)+B(G),XP(d)
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