MESON Chess Problem Database

Problem Display
PID: 109908 (5n1n/3P1P1p/1K2k2P/1Q1RNR1P/3p1p2/8/8/8 w - - 0 1)

Dalmiglio, Arnaldo

Caissa, 1980

5n1n/3P1P1p/1K2k2P/1Q1RNR1P/3p1p2/8/8/8

#2

9 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd7+
      • 2.Qxd7#
  • Tries
    • 1.Rf6+?
      • 1...Ke7
        • 2.d8Q#
        • 2.d8B#
      • 1...Kxf6!
    • 1.Qc6+?
      • 1...Ke7
        • 2.Qf6#
        • 2.d8Q#
        • 2.d8B#
      • 1...Kxf5!
    • 1.d8Q?
      • threat
        • 2.Rf6#
        • 2.Qf6#
      • 1...Sd7+
        • 2.Qbxd7#
        • 2.Qdxd7#
      • 1...Kxf5!
    • 1.d8S+?
      • 1...Ke7
        • 2.Sec6#
        • 2.Qe8#
        • 2.Qb4#
        • 2.Qc5#
      • 1...Kxf5!
    • 1.d8B?
      • threat
        • 2.Rf6#
      • 1...Sd7+
        • 2.Qxd7#
      • 1...Kxf5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Sd3#
        • 2.Sf3#
        • 2.Sc4#
        • 2.Sg4#
        • 2.Sc6#
        • 2.Sg6#
      • 1...Sxd7+
        • 2.Sxd7#
      • 1...Kxd5
        • 2.Sc4#
      • 1...Kxf5
        • 2.Sg4#
      • 1...Ke7
        • 2.Sc6#
      • 1...Sxf7
        • 2.Sxf7#
      • 1...Sfg6
        • 2.Sxg6#
      • 1...Shg6
        • 2.Sxg6#
      • 1...d3
        • 2.Sxd3#
      • 1...f3
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(e);CHECK,OGATE,XP(H)::QAB1(A),XS(e)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(c);P-FLIGHT::P=Q
      • Refutation
        • K(c);P-FLIGHT,XR(D)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);S_FLIGHT,XR(D)
    • Try
      • P(H);
      • Threat
        • DUALS(2)
      • Refutation
        • K(c);S_FLIGHT,XR(D)
    • Try
      • P(H);CHECK
      • Refutation
        • K(c);S_FLIGHT,XR(D)
    • Try
      • P(H);
      • Threat
        • R1(D)
      • Vars
        • S(e);CHECK,N_GUARD::QAB1(A),XS(e)
      • Refutation
        • K(c);S_FLIGHT,XR(D)
  • Actual
    • Q(A);
    • Threat
      • DUALS(6)
    • Vars
      • S(e);CHECK,XP(H)::QAR(A)+S(C),XS(e)
      • K(c);S_FLIGHT,XR(B)::R(D)+S(C)
      • K(c);S_FLIGHT,XR(D)::R(B)+S(C)
      • K(c);P-FLIGHT::QAR(A)+S(C),DCHECK
      • S(f);XP(I)::QAR(A)+S(C),XS(f)
      • S(e);::QAR(A)+S(C),XS(e)
      • S(f);::QAR(A)+S(C),XS(f)
      • P(a);::QAR(A)+S(C),XP(a)
      • P(b);::QAR(A)+S(C),XP(b)
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