MESON Chess Problem Database

Problem Display
PID: 84198 (8/2RpR3/N7/3p3b/ppPkPpN1/3p3p/1P3K2/1Q6 w - - 0 1)

Drazkowski, Krzysztof

Schweizer Schach-Magazin, 1991

8/2RpR3/N7/3p3b/ppPkPpN1/3p3p/1P3K2/1Q6

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...dxc4
      • 2.Rcxd7#
    • 1...dxe4
      • 2.Rexd7#
  • Tries
    • 1.Se5?
      • threat
        • 2.Qxd3#
      • 1...Kxe4
        • 2.Qxd3#
      • 1...dxc4
        • 2.Rxc4#
      • 1...dxe4
        • 2.Rcxd7#
      • 1...d2
        • 2.Qd3#
      • 1...Be2!
    • 1.Sxb4?
      • threat
        • 2.Qxd3#
      • 1...dxe4
        • 2.Rexd7#
      • 1...d2
        • 2.Qd3#
      • 1...dxc4!
    • 1.Qg1?
      • threat
        • 2.Ke1#
        • 2.Kf1#
        • 2.Kf3#
      • 1...Bxg4
        • 2.Ke1#
        • 2.Kf1#
      • 1...dxe4
        • 2.Rexd7#
      • 1...d2
        • 2.Ke2#
      • 1...f3
        • 2.Kxf3#
      • 1...h2!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qxd3#
      • 1...Kxc4
        • 2.Qxd3#
      • 1...dxc4
        • 2.Rexd7#
      • 1...dxe4
        • 2.Rxe4#
      • 1...d2
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(g);OGATEB,SBLOCK,XP(D)::R(H),XP(i)
    • P(g);OGATEB,SBLOCK,XP(E)::R(I),XP(i)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(e);P-FLIGHT,P_SPINP(a),XP(E)::QAB1(A),XP(a)
        • P(g);OGATE,XP(D)::R1(H),XP(g)
        • P(g);OGATEB,SBLOCK,XP(E)::R(H),XP(i)
        • P(a);::QAR1(A)
      • Refutation
        • B(h);
    • Try
      • S(G);XP(d)
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • P(g);OGATEB,SBLOCK,XP(E)::R(I),XP(i)
        • P(a);::QAR1(A)
      • Refutation
        • P(g);XP(D)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(g);OGATEB,SBLOCK,XP(E)::R(I),XP(i)
        • P(a);::QAB(A)+K(C)
        • P(f);::QAB(A)+K(C),XP(f)
      • Refutation
        • P(b);
  • Actual
    • S(G);
    • Threat
      • QAR1(A),XP(a)
    • Vars
      • K(e);P-FLIGHT,XP(D)::QAB1(A),XP(a)
      • P(g);OGATEB,SBLOCK,XP(D)::R(I),XP(i)
      • P(g);OGATE,XP(E)::R1(I),XP(g)
      • P(a);::QAR1(A)
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