MESON Chess Problem Database

Problem Display
PID: 227099 (8/b7/R1n2K2/3kpn2/2R1b1N1/BB3p2/1NqPP3/3Q4 w - - 0 1)

Gonzales, Manuel

US Problem Bulletin, 1985

8/b7/R1n2K2/3kpn2/2R1b1N1/BB3p2/1NqPP3/3Q4

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Rca4#
    • 1...Qxd2
      • 2.Rca4#
    • 1...Bd4
      • 2.Rxc2#
    • 1...Sfd4
      • 2.Se3#
    • 1...Scd4
      • 2.Rc5#
  • Tries
    • 1.Rca4+?
      • 1...Qxb3
        • 2.Qxb3#
      • 1...Qc4!
  • Keys
    • 1.d3!
      • threat
        • 2.dxe4#
      • 1...Qxd3
        • 2.Rca4#
      • 1...Qxc4
        • 2.dxc4#
      • 1...Bxd3
        • 2.e4#
      • 1...Bd4
        • 2.Rxc2#
      • 1...Sfd4
        • 2.Se3#
      • 1...Scd4
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_GUARD::B(F)+R(G)
    • Q(a);N_GUARD,P_SPINQ(a),XP(C)::B(F)+R(G)
    • B(h);SBLOCK::B(F)+R(G),XQ(a)
    • S(f);N_GUARD,S_CUTB(h)::S(H)
    • S(g);SBLOCK::B(F)+R(G),DCHECK
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • Q(a);OGATE,XB(F)::QAB(A),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
  • Actual
    • P(C);
    • Threat
      • QAR(A)+P(C)DCHECK,XB(c)
    • Vars
      • Q(a);N_GUARD,P_SPINQ(a),XP(C)::B(F)+R(G)
      • Q(a);OGATE,P_SPINQ(a),XR(G)::QAR(A)+P(C)DCHECK,XQ(a)
      • B(c);OGATE,P_SPINB(c),XP(C)::P(D)
      • B(h);SBLOCK::B(F)+R(G),XQ(a)
      • S(f);N_GUARD,S_CUTB(h)::S(H)
      • S(g);SBLOCK::B(F)+R(G),DCHECK
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