MESON Chess Problem Database

Problem Display
PID: 163547 (8/2b3n1/4pp1K/2p1Pk2/7R/2Q5/8/1b6 w - - 0 1)

di Scala, Pascal

Phenix, 1991

8/2b3n1/4pp1K/2p1Pk2/7R/2Q5/8/1b6

#2

4 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe5
      • 2.Qh3#
    • 1...fxe5
      • 2.Qf3#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Rf4#
        • 2.Qf4#
      • 1...Bxe5
        • 2.Qg4#
      • 1...fxe5
        • 2.Qf2#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sh5
        • 2.Rxh5#
      • 1...cxd4!
    • 1.Qc1?
      • threat
        • 2.Qf4#
      • 1...Kxe5
        • 2.Qxc5#
      • 1...Bxe5
        • 2.Qxb1#
      • 1...fxe5
        • 2.Qg5#
        • 2.Qf1#
      • 1...Sh5!
    • 1.Qc2+?
      • 1...Kxe5
        • 2.Qxc5#
      • 1...Bxc2!
    • 1.Qe3?
      • threat
        • 2.Rf4#
        • 2.Qf4#
      • 1...Bxe5
        • 2.Qh3#
      • 1...fxe5
        • 2.Qf2#
        • 2.Qg5#
        • 2.Qf3#
      • 1...Be4
        • 2.Qf4#
        • 2.Qxe4#
      • 1...Sh5!
    • 1.Qg3?
      • threat
        • 2.Qf4#
      • 1...Bxe5
        • 2.Qh3#
        • 2.Qg4#
        • 2.Qg6#
      • 1...fxe5
        • 2.Qf2#
        • 2.Qf3#
        • 2.Qg5#
        • 2.Qg6#
      • 1...Sh5!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qf4#
      • 1...Kxe5
        • 2.Qxc5#
      • 1...Bxe5
        • 2.Qg4#
      • 1...fxe5
        • 2.Qf1#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sh5
        • 2.Rxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(f);SBLOCK,XP(C)::QAB(A)
    • P(e);SBLOCK,XP(C)::QAR2(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);SBLOCK,XP(C)::QAB1(A)
        • P(e);SBLOCK,XP(C)::QAR(A)
        • B(a);N_GUARD::QAB1(A),XB(a)
        • S(g);N_GUARD::R(B),XS(g)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(C)::QAR2(A),XP(b)
        • B(f);SBLOCK,XP(C)::QAB(A),XB(a)
      • Refutation
        • S(g);
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(C)::QAR2(A),XP(b)
      • Refutation
        • B(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);SBLOCK,XP(C)::QAB(A)
      • Refutation
        • S(g);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Refutation
        • S(g);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);OGATEB,P-FLIGHT,XP(C)::QAR2(A),XP(b)
      • B(f);SBLOCK,XP(C)::QAB1(A)
      • P(e);SBLOCK,XP(C)::QAR(A)
      • B(a);N_GUARD::QAB1(A),XB(a)
      • S(g);N_GUARD::R(B),XS(g)
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