MESON Chess Problem Database

Problem Display
PID: 120721 (4Q3/6K1/8/2BBN1pb/2n1Pk1b/8/1n3P2/5R2 w - - 0 1)

Scheel, Johan

Norwegian Federation, 1917

4Q3/6K1/8/2BBN1pb/2n1Pk1b/8/1n3P2/5R2

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Be3#
    • 1...Sa3
      • 2.Be3#
    • 1...Se3
      • 2.Bxe3#
    • 1...Sa5
      • 2.Be3#
    • 1...Sb6
      • 2.Be3#
    • 1...Sd6
      • 2.Be3#
  • Tries
    • 1.Qf7+?
      • 1...Kxe5
        • 2.Qf5#
        • 2.Qf6#
      • 1...Bxf7!
    • 1.Qf8+?
      • 1...Kxe5
        • 2.Qf5#
        • 2.Qf6#
      • 1...Bf7!
  • Keys
    • 1.Qxh5!
      • threat
        • 2.Sg6#
      • 1...Kxe5
        • 2.f4#
      • 1...Bxf2
        • 2.Qh2#
      • 1...Sxe5
        • 2.Be3#
      • 1...g4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • S(b);N_GUARD::B(D)
    • S(b);N_GUARD::B(D),XS(b)
  • Tries
    • Try
      • Q(H);CHECK
      • Refutation
        • B(f);XQ(H)
    • Try
      • Q(H);CHECK
      • Refutation
        • B(f);P_SPINB(f)
  • Actual
    • Q(H);XB(f)
    • Threat
      • S(F)
    • Vars
      • K(c);OGATE,P_SPINP(e),S_FLIGHT,XS(F)::P(B)
      • B(d);OGATE,P_SPINB(d),XP(B)::QAB(H)
      • S(b);N_GUARD,SBLOCK,XS(F)::B(D)
      • P(e);OGATE::QAR1(H)
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