MESON Chess Problem Database

Problem Display
PID: 84629 (R3Nkr1/K7/1p2Q1p1/8/5q2/8/5R2/2b2r2 w - - 0 1)

Szwedowski, Leopold Mieczyslaw

Schach-Aktiv, 1986

R3Nkr1/K7/1p2Q1p1/8/5q2/8/5R2/2b2r2

#2

5 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Qxf6#
    • 1...Qf7+
      • 2.Qxf7#
    • 1...Rg7+
      • 2.Sc7#
  • Tries
    • 1.Rxf4+?
      • 1...Bxf4
        • 2.Qf6#
      • 1...Rxf4!
    • 1.Qd7?
      • threat
        • 2.Sd6#
        • 2.Sc7#
        • 2.Sg7#
      • 1...Rxf2
        • 2.Sd6#
        • 2.Sc7#
      • 1...Rg7
        • 2.Sd6#
        • 2.Sc7#
        • 2.Sxg7#
        • 2.Qxg7#
      • 1...Qf7
        • 2.Qxf7#
      • 1...Re1!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Sd6#
      • 1...Qf7+
        • 2.Sc7#
      • 1...Rg7+
        • 2.Qxg7#
      • 1...Kf7
        • 2.Sd6#
      • 1...Qf6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD::QAR2(B),XQ(c)
    • Q(c);CHECK,N_GUARD::QAR1(B),XQ(c)
    • R(g);CHECK,SBLOCK::R(D)+S(E)
  • Tries
    • Try
      • R(A);CHECK,XQ(c)
      • Vars
        • B(a);XR(A)::QAR2(B)
      • Refutation
        • R(b);XR(A)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);N_GUARD,P_PINQ(B)::QAR1(B),XQ(c)
      • Refutation
        • R(b);
  • Actual
    • Q(B);
    • Threat
      • R(D)+S(E)
    • Vars
      • Q(c);CHECK::R(D)+S(E)
      • R(g);CHECK,N_GUARD::QAB1(B),XR(g)
      • K(f);P-FLIGHT::S(E)
      • Q(c);N_GUARD::QAR2(B),XQ(c)
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