MESON Chess Problem Database

Problem Display
PID: 248402 (8/3B4/Nb6/1Pn4p/kB6/8/2P5/1K1Q4 w - - 0 1)

Blikeng, Bjarne

Arbejder-Skak, 1951

8/3B4/Nb6/1Pn4p/kB6/8/2P5/1K1Q4

#2

7 + 4

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.cxb3#
    • 1...Sd3
      • 2.cxd3#
      • 2.c3#
      • 2.c4#
    • 1...Se4
      • 2.c3#
      • 2.c4#
    • 1...Sxa6
      • 2.c3#
    • 1...Se6
      • 2.c3#
      • 2.c4#
    • 1...Sb7
      • 2.c3#
      • 2.c4#
    • 1...Sxd7
      • 2.c4#
  • Tries
    • 1.Sxc5+?
      • 1...Bxc5
        • 2.c3#
      • 1...Kxb4!
    • 1.Bc6?
      • 1...Sxa6
        • 2.c3#
      • 1...Ba5
        • 2.b6#
      • 1...Ba7
        • 2.b6#
      • 1...Bc7
        • 2.b6#
      • 1...Bd8
        • 2.b6#
      • 1...Sb3
        • 2.cxb3#
      • 1...Sd3
        • 2.cxd3#
        • 2.c3#
        • 2.c4#
      • 1...Se4
        • 2.c3#
        • 2.c4#
      • 1...Se6
        • 2.c3#
        • 2.c4#
      • 1...Sb7
        • 2.c3#
        • 2.c4#
      • 1...Sd7
        • 2.c3#
        • 2.c4#
      • 1...h4!
    • 1.Qd5?
      • threat
        • 2.Qa2#
      • 1...Sxa6
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
        • 2.cxb3#
      • 1...Sxd7!
  • Keys
    • 1.Kb2!
      • threat
        • 2.Qa1#
      • 1...Sd3+
        • 2.cxd3#
      • 1...Sxa6
        • 2.c3#
      • 1...Sxd7
        • 2.c4#
      • 1...Sb3
        • 2.cxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE::P(C),XS(b)
    • S(b);N_GUARD,XS(F)::QAB(B)+P(C)
    • S(b);N_GUARD,XB(G)::QAB(B)+P(C)
  • Tries
    • Try
      • S(F);CHECK,XS(b)
      • Vars
        • B(d);XS(F)::QAB(B)+P(C)
      • Refutation
        • K(a);P-FLIGHT,XB(D)
    • Try
      • B(G);
      • Vars
        • S(b);N_GUARD,XS(F)::QAB(B)+P(C)
        • B(d);OGATE::B(G)+P(E)
        • S(b);OGATE::P(C),XS(b)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • S(b);N_GUARD,XS(F)::QAB1(B)
      • Refutation
        • S(b);XB(G)
  • Actual
    • K(A);P-FLIGHT
    • Threat
      • QAR(B)
    • Vars
      • S(b);CHECK,OGATE::QAB(B)+P(C),XS(b)
      • S(b);N_GUARD,XS(F)::QAB(B)+P(C)
      • S(b);N_GUARD,XB(G)::QAB(B)+P(C)
      • S(b);OGATE::P(C),XS(b)
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