MESON Chess Problem Database

Problem Display
PID: 944 (7Q/8/8/1n1P2p1/4p1P1/3Pk3/2P2R2/6K1 w - - 0 1)

Steiner, Paul

The Problemist Supplement, 1993

7Q/8/8/1n1P2p1/4p1P1/3Pk3/2P2R2/6K1

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...exd3
      • 2.Qe5#
  • Tries
    • 1.Qa1?
      • 1...exd3
        • 2.Qe5#
      • 1...Sc3
        • 2.Qa7#
      • 1...Sd4
        • 2.Qc1#
      • 1...Sd6
        • 2.Qa7#
      • 1...Sa7
        • 2.Qxa7#
      • 1...Sc7
        • 2.Qa7#
      • 1...Sa3!
    • 1.Qc3?
      • 1...exd3
        • 2.Qe5#
        • 2.Qxd3#
      • 1...Sa3
        • 2.Qc5#
        • 2.d4#
      • 1...Sd4
        • 2.Qd2#
      • 1...Sd6
        • 2.Qc5#
        • 2.d4#
      • 1...Sa7
        • 2.Qc5#
        • 2.d4#
      • 1...Sc7
        • 2.Qc5#
        • 2.d4#
      • 1...Sxc3!
    • 1.Qf6?
      • 1...exd3
        • 2.Qe5#
      • 1...Sa3
        • 2.Qb6#
      • 1...Sc3
        • 2.Qb6#
      • 1...Sd4
        • 2.Qxg5#
      • 1...Sa7
        • 2.Qb6#
      • 1...Sc7
        • 2.Qb6#
      • 1...Sd6!
    • 1.Qg7?
      • 1...exd3
        • 2.Qe5#
      • 1...Sa3
        • 2.Qa7#
      • 1...Sc3
        • 2.Qa7#
      • 1...Sd4
        • 2.Qxg5#
      • 1...Sd6
        • 2.Qa7#
      • 1...Sa7
        • 2.Qxa7#
      • 1...Sc7!
    • 1.Qh7?
      • threat
        • 2.Qxe4#
      • 1...exd3
        • 2.Qxd3#
      • 1...Sc3
        • 2.Qa7#
      • 1...Sd6
        • 2.Qa7#
      • 1...Kd4!
  • Keys
    • 1.Qb2!
      • 1...exd3
        • 2.Qe5#
      • 1...Sc3
        • 2.Qb6#
      • 1...Sa3
        • 2.Qb6#
      • 1...Sd4
        • 2.Qc1#
      • 1...Sd6
        • 2.Qb6#
      • 1...Sa7
        • 2.Qb6#
      • 1...Sc7
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB,XP(D)::QAR2(G)
  • Tries
    • Try
      • Q(G);
      • Vars
        • P(b);OGATEB,XP(D)::QAR2(G)
        • S(c);N_GUARD::QAB(G)
        • S(c);SBLOCK::QAB(G)
        • S(c);N_GUARD::QAB(G),XS(c)
      • Refutation
        • S(c);
    • Try
      • Q(G);
      • Vars
        • S(c);SBLOCK::QAB1(G)
      • Refutation
        • S(c);XQ(G)
    • Try
      • Q(G);
      • Vars
        • P(b);OGATEB,XP(D)::QAR2(G)
        • S(c);N_GUARD::QAB(G)
        • S(c);SBLOCK::QAB(G),XP(d)
      • Refutation
        • S(c);
    • Try
      • Q(G);
      • Vars
        • P(b);OGATEB,XP(D)::QAR2(G)
        • S(c);N_GUARD::QAB(G)
        • S(c);SBLOCK::QAB(G),XP(d)
        • S(c);N_GUARD::QAB(G),XS(c)
      • Refutation
        • S(c);
    • Try
      • Q(G);
      • Threat
        • QAR1(G),XP(b)
      • Vars
        • P(b);OGATE,XP(D)::QAR1(G),XP(b)
        • S(c);N_GUARD::QAB(G)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • P(b);OGATEB,XP(D)::QAR2(G)
      • S(c);OGATE::QAB(G)
      • S(c);SBLOCK::QAB(G)
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