MESON Chess Problem Database

Problem Display
PID: 192914 (6B1/8/2Q5/B4p2/2b2K2/1p6/1P4R1/3k4 w - - 0 1)

Grupen, Claus

Schweizerische Schachzeitung, 1984

6B1/8/2Q5/B4p2/2b2K2/1p6/1P4R1/3k4

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Bxb3#
    • 1...Be2
      • 2.Bxb3#
    • 1...Bb5
      • 2.Bxb3#
    • 1...Ba6
      • 2.Bxb3#
  • Tries
    • 1.Bd2?
      • 1...Bxg8
        • 2.Qc1#
      • 1...Bf1
        • 2.Bxb3#
        • 2.Qc1#
      • 1...Be2
        • 2.Qc1#
      • 1...Bd3
        • 2.Qc1#
      • 1...Bb5
        • 2.Bxb3#
        • 2.Qc1#
      • 1...Bd5
        • 2.Qc1#
      • 1...Ba6
        • 2.Bxb3#
        • 2.Qc1#
      • 1...Be6
        • 2.Qc1#
      • 1...Bf7
        • 2.Qc1#
      • 1...Kc2!
    • 1.Qe4?
      • threat
        • 2.Qb1#
        • 2.Qe1#
      • 1...Kc1
        • 2.Qe1#
      • 1...Bd3
        • 2.Qe1#
      • 1...Be2
        • 2.Qb1#
      • 1...fxe4!
  • Keys
    • 1.Re2!
      • 1...Kc1
        • 2.Qh1#
      • 1...Kxe2
        • 2.Qf3#
      • 1...Bxe2
        • 2.Bxb3#
      • 1...Bxg8
        • 2.Re1#
      • 1...Bd3
        • 2.Re1#
      • 1...Bb5
        • 2.Re1#
      • 1...Bd5
        • 2.Re1#
      • 1...Ba6
        • 2.Re1#
      • 1...Be6
        • 2.Re1#
      • 1...Bf7
        • 2.Re1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • B(c);OGATE::B(F),XP(b)
  • Tries
    • Try
      • B(D);
      • Vars
        • B(c);OGATE,XB(F)::QAR1(E)
        • B(c);OGATE::QAR1(E)
      • Refutation
        • K(a);P_SPINB(c),S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • B(c);::QAR1(E)
        • B(c);::QAR2(E)
      • Refutation
        • P(d);XQ(E)
  • Actual
    • R(B);
    • Vars
      • K(a);P-FLIGHT,P_SPINB(c)::QAR(E)
      • K(a);OGATEB,S_FLIGHT,XR(B)::QAB1(E)
      • B(c);OGATE,SBLOCK,XR(B)::B(F),XP(b)
      • B(c);XB(F)::R1(B)
      • B(c);::R1(B)
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