MESON Chess Problem Database

Problem Display
PID: 245073 (QB6/5p2/K1P4p/pNR3pr/3pkPB1/4r3/2P1n2b/5qn1 w - - 0 1)

Ekstrom, Sven Johan Adrian

Schackvarlden, 1944

QB6/5p2/K1P4p/pNR3pr/3pkPB1/4r3/2P1n2b/5qn1

#2

9 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Bf5#
    • 1...Qxf4
      • 2.c7#
    • 1...Bxf4
      • 2.c7#
    • 1...Sf3
      • 2.Bf5#
    • 1...Sxf4
      • 2.Re5#
    • 1...gxf4
      • 2.Sd6#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Qe8#
        • 2.c7#
      • 1...Qxf4
        • 2.c7#
      • 1...Bxf4
        • 2.c7#
      • 1...Sxf4
        • 2.Re5#
      • 1...Ra3
        • 2.Qe8#
      • 1...Rb3
        • 2.Qe8#
      • 1...Rc3
        • 2.Qe8#
      • 1...Rd3
        • 2.Qe8#
      • 1...Rf3
        • 2.Qe8#
      • 1...Rg3
        • 2.Qe8#
      • 1...Reh3
        • 2.Qe8#
      • 1...Sf3
        • 2.Bf5#
        • 2.c7#
      • 1...Sc3
        • 2.Qe8#
      • 1...gxf4!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qe7#
      • 1...Qxf4
        • 2.c7#
      • 1...Bxf4
        • 2.c7#
      • 1...Sxf4
        • 2.Re5#
      • 1...gxf4
        • 2.Sd6#
      • 1...Sf3
        • 2.Bf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(a);SBLOCK::B(C)
    • Q(a);SBLOCK,XP(B)::QAB(H)+P(G)
    • B(d);SBLOCK,XP(B)::QAB(H)+P(G)
    • S(b);SBLOCK::B(C)
    • S(c);P_PINS(D),SBLOCK,XP(B)::R1(E)
    • P(i);SBLOCK,XP(B)::S(D)
  • Tries
    • Try
      • B(I);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);XP(B)::QAB(H)+P(G)
        • B(d);XP(B)::QAB(H)+P(G)
        • S(c);P_PINS(D),SBLOCK,XP(B)::R1(E)
        • R(e);::QAR(H)
        • S(c);P_PINS(D)::QAR(H)
      • Refutation
        • P(i);XP(B)
  • Actual
    • Q(H);
    • Threat
      • QAR(H)
    • Vars
      • Q(a);SBLOCK,XP(B)::QAB(H)+P(G)
      • B(d);SBLOCK,XP(B)::QAB(H)+P(G)
      • S(c);P_PINS(D),SBLOCK,XP(B)::R1(E)
      • P(i);SBLOCK,XP(B)::S(D)
      • S(b);SBLOCK::B(C)
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Developed and maintained by Brian Stephenson.
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