MESON Chess Problem Database

Problem Display
PID: 148861 (b2nqr2/8/n2B4/Q6R/p1Bpk1Pb/3R1pp1/3p2r1/3K1N2 w - - 0 1)

Liew, Chee Meng

1st Prize=, The Hindu, 1985

b2nqr2/8/n2B4/Q6R/p1Bpk1Pb/3R1pp1/3p2r1/3K1N2

#2

8 + 13

56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Qe5#
    • 1...Qg6
      • 2.Qe5#
    • 1...Qd7
      • 2.Qe5#
    • 1...Qf7
      • 2.Qe5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rg8
      • 2.Qf5#
    • 1...Rh8
      • 2.Qf5#
    • 1...Bf6
      • 2.Qf5#
    • 1...Be7
      • 2.Qe5#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Sc6
      • 2.Qd5#
    • 1...Se6
      • 2.Qe5#
    • 1...Sb7
      • 2.Qd5#
    • 1...Sf7
      • 2.Qf5#
    • 1...f2
      • 2.Sxd2#
  • Tries
    • 1.Re5+?
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Kf4!
    • 1.Qc5?
      • threat
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Bf6
        • 2.Qf5#
      • 1...Sc6
        • 2.Qd5#
      • 1...Se6
        • 2.Qe5#
      • 1...f2
        • 2.Sxd2#
        • 2.Qxd4#
      • 1...Sxc5!
  • Keys
    • 1.Qxd2!
      • threat
        • 2.Rxd4#
      • 1...Rxd2+
        • 2.Sxd2#
      • 1...Qe5
        • 2.Rxe5#
      • 1...Bf6
        • 2.Qf4#
      • 1...Sc6
        • 2.Bd5#
      • 1...Se6
        • 2.Re5#
      • 1...f2
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • Q(l);N_GUARD::QAR1(F)
    • Q(l);N_GUARD::QAR1(F),XQ(l)
    • R(m);N_GUARD::QAB1(F),XR(m)
    • R(m);N_GUARD::QAB1(F)
    • B(h);S_CUTR(m)::QAB1(F)
    • B(h);S_CUTQ(l)::QAR1(F)
    • B(j);N_GUARD::QAB1(F),XB(j)
    • S(k);S_CUTB(j)::QAB1(F)
    • S(k);S_CUTQ(l)::QAR1(F)
    • S(k);S_CUTR(m)::QAB1(F)
    • P(c);S_CUTR(b)::S(B),XP(a)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • Q(l);OGATE,XR(G)::QAR1(F),XQ(l)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(l);N_GUARD::QAR1(F),XQ(l)
        • B(h);S_CUTR(m)::QAB1(F)
        • S(k);S_CUTB(j)::QAB1(F)
        • S(k);S_CUTQ(l)::QAR1(F)
      • Refutation
        • S(i);XQ(F)
  • Actual
    • Q(F);XP(a)
    • Threat
      • R1(C),XP(f)
    • Vars
      • R(b);CHECK,XQ(F)::S(B),XR(b)
      • Q(l);N_GUARD::R1(G),XQ(l)
      • B(h);S_CUTR(m)::QAR1(F)
      • S(k);S_CUTB(j)::B(D)
      • S(k);S_CUTQ(l)::R1(G)
      • P(c);N_GUARD,S_CUTR(b)::QAR2(F)
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