MESON Chess Problem Database

Problem Display
PID: 133560 (4r3/3r4/4p3/1p1N4/1K1k1P2/2NP1n2/2P5/Q7 w - - 0 1)

Paslack, Rainer

StrateGems, 2008

4r3/3r4/4p3/1p1N4/1K1k1P2/2NP1n2/2P5/Q7

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Sd1#
    • 1...Ra7
      • 2.Qxa7#
    • 1...Rdd8
      • 2.Qa7#
    • 1...Sg1
      • 2.Qxg1#
    • 1...Sd2
      • 2.Qg1#
    • 1...Sh2
      • 2.Qg1#
    • 1...Sh4
      • 2.Qg1#
    • 1...Se5
      • 2.Qg1#
    • 1...Sg5
      • 2.Qg1#
    • 1...exd5
      • 2.Sd1#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qf2#
        • 2.Qe3#
        • 2.Qe4#
      • 1...Rxd5
        • 2.Qf2#
        • 2.Qe4#
      • 1...exd5
        • 2.Sxb5#
      • 1...Sd2
        • 2.Qf2#
        • 2.Qg1#
        • 2.Qe3#
        • 2.Qe5#
      • 1...Sg5
        • 2.Qf2#
        • 2.Qg1#
        • 2.Qe3#
        • 2.Qe5#
      • 1...Sxe1!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qe3#
      • 1...Rxd5
        • 2.Se2#
      • 1...exd5
        • 2.Sxb5#
      • 1...Sd2
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • R(e);SBLOCK,XS(G)::QAB(A)+S(C)
    • R(e);N_GUARD::QAB(A),XR(e)
    • R(e);N_GUARD::QAB(A)
    • S(a);N_GUARD::QAB(A),XS(a)
    • S(a);N_GUARD::QAB(A)
    • P(d);SBLOCK,XS(G)::QAB(A)+S(C)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(d);SBLOCK,XS(G)::S(C),XP(c)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • R(e);SBLOCK,XS(G)::S(C)
      • P(d);SBLOCK,XS(G)::S(C),XP(c)
      • S(a);N_GUARD::QAB(A)
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