MESON Chess Problem Database

Problem Display
PID: 118218 (6B1/6Rp/b1pk1BRK/n1p5/1r5p/1Q6/qP6/8 w - - 0 1)

Piatesi, Antonio

Canadian Chess Chat, 1980

6B1/6Rp/b1pk1BRK/n1p5/1r5p/1Q6/qP6/8

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qe6#
    • 1...Qa1
      • 2.Qe6#
    • 1...Qxb2
      • 2.Qe6#
    • 1...Qa3
      • 2.Qe6#
    • 1...Qa4
      • 2.Qe6#
    • 1...Ra4
      • 2.Qb8#
    • 1...Rc4
      • 2.Qb8#
    • 1...Rd4
      • 2.Qb8#
    • 1...Re4
      • 2.Qb8#
    • 1...Rf4
      • 2.Qb8#
    • 1...Rg4
      • 2.Qb8#
    • 1...Rb8
      • 2.Qxb8#
    • 1...Sc4
      • 2.Qd3#
  • Tries
    • 1.Bd8+?
      • 1...hxg6
        • 2.Bc7#
      • 1...Ke5!
    • 1.Qg3+?
      • 1...Rf4
        • 2.Qxf4#
      • 1...hxg3!
  • Keys
    • 1.Rg5!
      • threat
        • 2.Be5#
      • 1...Qxb2
        • 2.Qe6#
      • 1...Re4
        • 2.Qb8#
      • 1...Sc4
        • 2.Qd3#
      • 1...c4
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • Q(a);N_GUARD::QAR1(B)
    • Q(a);N_GUARD,XP(A)::QAR1(B)
    • R(b);OGATE::QAB(B)
    • R(b);OGATE::QAB(B),XR(b)
    • S(d);S_CUTB(f),S_CUTQ(a),S_CUTR(b)::QAR(B)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • P(i);XR(D)::B(C)
      • Refutation
        • K(h);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB(B),XR(b)
      • Refutation
        • P(c);XQ(B)
  • Actual
    • R(D);
    • Threat
      • B(C)
    • Vars
      • Q(a);N_GUARD,XP(A)::QAR1(B)
      • R(b);OGATE::QAB(B)
      • S(d);S_CUTB(f),S_CUTQ(a),S_CUTR(b)::QAR(B)
      • P(e);S_CUTB(f),S_CUTQ(a),S_CUTR(b)::QAR(B)
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