MESON Chess Problem Database

Problem Display
PID: 200253 (1R6/8/2N5/8/K2p1p2/p1p4r/2k1B1Q1/1Nb3q1 w - - 0 1)

Liew, Chee Meng

The Problemist, 1982

1R6/8/2N5/8/K2p1p2/p1p4r/2k1B1Q1/1Nb3q1

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Sxd4#
    • 1...Qe1
      • 2.Sxd4#
    • 1...Qf1
      • 2.Sxd4#
    • 1...Qh1
      • 2.Sxd4#
    • 1...Qxg2
      • 2.Sxd4#
    • 1...Re3
      • 2.Sxd4#
  • Tries
    • 1.Bd1+?
      • 1...Kd3
        • 2.Qe2#
      • 1...Kxd1!
    • 1.Bd3+?
      • 1...Kd1
        • 2.Qxg1#
        • 2.Qe2#
      • 1...Kxd3!
    • 1.Qe4+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...d3!
    • 1.Qxg1?
      • threat
        • 2.Sxd4#
        • 2.Qd1#
      • 1...Rh1
        • 2.Sxd4#
      • 1...Be3
        • 2.Qd1#
      • 1...d3
        • 2.Sd4#
        • 2.Bd1#
        • 2.Qd1#
      • 1...Rd3!
    • 1.Qg6+?
      • 1...Qxg6
        • 2.Sxd4#
      • 1...Rd3
        • 2.Qxd3#
      • 1...d3!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Bd1#
      • 1...Qxf1
        • 2.Sxd4#
      • 1...Qg4
        • 2.Sxd4#
        • 2.Qd1#
      • 1...Rd3
        • 2.Bxd3#
      • 1...Bb2
        • 2.Sb4#
      • 1...Bd2
        • 2.Sxa3#
      • 1...Be3
        • 2.Bd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(b);N_GUARD::S(E),XP(g)
    • Q(b);N_GUARD,XQ(C)::S(E),XP(g)
    • R(f);S_CUTQ(b)::S(E),XP(g)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT,XB(B)
    • Try
      • B(B);CHECK
      • Refutation
        • K(c);S_FLIGHT,XB(B)
    • Try
      • Q(C);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAB1(C),XR(f)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • Q(C);XQ(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(f);::S(E),XP(g)
        • B(a);::QAB1(C)
      • Refutation
        • R(f);
    • Try
      • Q(C);CHECK
      • Vars
        • Q(b);XQ(C)::S(E),XP(g)
        • R(f);N_GUARD,P_SPINR(f)::QAB1(C),XR(f)
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • Q(C);
    • Threat
      • B(B)
    • Vars
      • Q(b);N_GUARD,XQ(C)::S(E),XP(g)
      • R(f);N_GUARD::B(B),XR(f)
      • B(a);SBLOCK::S(E)
      • B(a);N_GUARD,SBLOCK::S(A),XP(d)
      • B(a);S_CUTR(f)::B(B)
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