MESON Chess Problem Database

Problem Display
PID: 205161 (2R5/3p4/p2p4/n1pkBK2/6p1/3P2P1/5n2/3Q4 w - - 0 1)

Rice, John Michael

Phenix, 1995

2R5/3p4/p2p4/n1pkBK2/6p1/3P2P1/5n2/3Q4

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sh1
      • 2.Qxh1#
    • 1...Sxd3
      • 2.Qxd3#
    • 1...Sh3
      • 2.Qh1#
    • 1...c4
      • 2.dxc4#
  • Tries
    • 1.Qc2?
      • 1...Sxd3
        • 2.Qxd3#
      • 1...dxe5
        • 2.Qxc5#
      • 1...Se4
        • 2.dxe4#
      • 1...Sd1
        • 2.Qg2#
      • 1...Sh1
        • 2.Qg2#
      • 1...Sh3
        • 2.Qg2#
      • 1...Sb3
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
        • 2.dxc4#
      • 1...Sc6
        • 2.Qc4#
      • 1...Sb7
        • 2.Qc4#
      • 1...c4!
    • 1.Qf3+?
      • 1...Se4
        • 2.Qxe4#
      • 1...gxf3!
    • 1.Qh1+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Sxh1!
  • Keys
    • 1.Qa4!
      • 1...Sxd3
        • 2.Qe4#
      • 1...dxe5
        • 2.Qxd7#
      • 1...Se4
        • 2.Qxe4#
        • 2.dxe4#
      • 1...Sd1
        • 2.Qe4#
      • 1...Sh1
        • 2.Qe4#
      • 1...Sh3
        • 2.Qe4#
      • 1...Sb3
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
        • 2.dxc4#
      • 1...Sc6
        • 2.Qc4#
      • 1...Sb7
        • 2.Qc4#
      • 1...c4
        • 2.Qxa5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(A),XS(a)
    • S(a);OGATE,P_SPINS(a),XP(B)::QAR2(A),XS(a)
    • S(a);N_GUARD::QAB(A)
    • P(d);OGATE::QAR(A)+P(B)DCHECK,XP(d)
  • Tries
    • Try
      • Q(A);
      • Vars
        • S(a);OGATE,XP(B)::QAR2(A),XS(a)
        • P(g);N_GUARD,XB(D)::QAR1(A),XP(d)
        • S(a);OGATE::P(B),XS(a)
        • S(a);OGATE::QAB(A)
        • S(c);N_GUARD::QAB1(A)
      • Refutation
        • P(d);
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • S(a);N_GUARD,XP(B)::QAB1(A)
      • P(g);OGATEB,XB(D)::QAR2(A),XP(h)
      • S(a);N_GUARD::QAB1(A)
      • S(c);N_GUARD::QAB1(A)
      • P(d);OGATEB::QAR(A),XS(c)
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