MESON Chess Problem Database

Problem Display
PID: 92002 (8/3K4/3N1R2/Rp1k4/2br1r2/2Q2P2/7B/8 w - - 0 1)

Pachman, Vladimir

Deutsche Schachzeitung, 1958

8/3K4/3N1R2/Rp1k4/2br1r2/2Q2P2/7B/8

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Rxb5#
    • 1...Ke5
      • 2.Rf5#
    • 1...Rg4
      • 2.Rf5#
    • 1...Rh4
      • 2.Rf5#
    • 1...Rf5
      • 2.Rxf5#
    • 1...Ba2
      • 2.Rxb5#
    • 1...Bb3
      • 2.Rxb5#
  • Tries
    • 1.Qxd4+?
      • 1...Rxd4
        • 2.Rf5#
      • 1...Kxd4!
    • 1.Qxc4+?
      • 1...Ke5
        • 2.Rf5#
        • 2.Re6#
        • 2.Qe6#
      • 1...Rxc4!
  • Keys
    • 1.Sxb5!
      • threat
        • 2.Sc7#
      • 1...Kc5+
        • 2.Sxd4#
      • 1...Ke5+
        • 2.Qxd4#
      • 1...Bxb5+
        • 2.Rxb5#
      • 1...Rxf3
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • K(e);P-FLIGHT,P_PINS(E),P_SPINB(a)::R1(D),XP(d)
    • K(e);P-FLIGHT,P_PINS(E),P_SPINR(b)::R1(F)
    • R(c);N_GUARD::R(F)
    • R(c);N_GUARD::R(F),XR(c)
    • B(a);N_GUARD::R(D),XP(d)
  • Tries
    • Try
      • Q(B);CHECK,XR(b)
      • Vars
        • R(c);SBLOCK,XQ(B)::R(F)
      • Refutation
        • K(e);N_SPINP(d),P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK,XB(a)
      • Refutation
        • R(b);XQ(B)
  • Actual
    • S(E);XP(d)
    • Threat
      • R(D)+S(E),DCHECK
    • Vars
      • K(e);CHECK,P-FLIGHT,P_SPINB(a)::R(D)+S(E),XR(b)
      • K(e);CHECK,P-FLIGHT,P_SPINR(b)::QAB1(B),XR(b)
      • B(a);CHECK,OGATE,P_SPINB(a),XS(E)::R(D),XB(a)
      • R(c);N_GUARD,XP(C)::QAR1(B),XR(b)
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