MESON Chess Problem Database

Problem Display
PID: 18153 (8/8/4B3/6p1/2p1k1rb/2BN1p2/8/1K1N1Q2 w - - 0 1)

Maclay, J Neil

Time & Tide, 1953

8/8/4B3/6p1/2p1k1rb/2BN1p2/8/1K1N1Q2

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Sc5#
    • 1...f2
      • 2.Qe2#
  • Tries
    • 1.S1f2+?
      • 1...Ke3
        • 2.Qe1#
      • 1...Bxf2!
    • 1.Se1?
      • threat
        • 2.Qxc4#
        • 2.Qxf3#
      • 1...Kf4
        • 2.Qxf3#
      • 1...Bxe1
        • 2.Qxc4#
      • 1...Rg3
        • 2.Qxc4#
      • 1...Rf4
        • 2.Qxc4#
      • 1...f2
        • 2.Qxc4#
      • 1...Bf2!
    • 1.Se5?
      • threat
        • 2.Qxc4#
        • 2.Qxf3#
      • 1...Kf4
        • 2.Qxf3#
      • 1...Rg3
        • 2.Qxc4#
      • 1...Rf4
        • 2.Qxc4#
      • 1...f2
        • 2.Qxc4#
      • 1...Bf2!
    • 1.Qe1+?
      • 1...Kxd3
        • 2.Sb2#
        • 2.Qe3#
      • 1...Bxe1!
    • 1.Qf2?
      • threat
        • 2.Qe3#
        • 2.Qd4#
      • 1...Kxd3
        • 2.Qe3#
        • 2.Qc2#
        • 2.Qxf3#
      • 1...Bxf2!
  • Keys
    • 1.Qh3!
      • 1...Kxd3
        • 2.Qxf3#
      • 1...cxd3
        • 2.Qxg4#
      • 1...Rg1
        • 2.Qf5#
      • 1...Rg2
        • 2.Qf5#
      • 1...Rg3
        • 2.Qf5#
      • 1...Rf4
        • 2.Sc5#
      • 1...Be1
        • 2.Qh7#
      • 1...Bf2
        • 2.Qh7#
      • 1...Bg3
        • 2.Qh7#
      • 1...f2
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • R(d);SBLOCK::S(E)
    • P(a);N_GUARD::QAR2(C)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
      • Refutation
        • B(e);XS(B)
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a)::QAR1(C),XP(a)
        • B(e);XS(E)::QAR2(C),XP(b)
        • R(d);::QAR2(C),XP(b)
        • R(d);SBLOCK::QAR2(C),XP(b)
        • P(a);::QAR2(C),XP(b)
      • Refutation
        • B(e);
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a)::QAR1(C),XP(a)
        • R(d);::QAR2(C),XP(b)
        • R(d);SBLOCK::QAR2(C),XP(b)
        • P(a);::QAR2(C),XP(b)
      • Refutation
        • B(e);
    • Try
      • Q(C);CHECK
      • Refutation
        • B(e);XQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Refutation
        • B(e);XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(c);P_SPINP(a),S_FLIGHT,XS(E)::QAR2(C),XP(a)
      • P(b);SBLOCK,XS(E)::QAR2(C),XR(d)
      • R(d);OGATE,P_PINS(B)::QAB1(C)
      • R(d);OGATE::QAB1(C)
      • R(d);SBLOCK::S(E)
      • B(e);OGATE::QAB(C)
      • P(a);OGATE::QAR1(C)
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