MESON Chess Problem Database

Problem Display
PID: 109337 (5Q2/3p1P1R/4k1p1/r5p1/4B1P1/8/1B2K3/8 w - - 0 1)

Scheel, Johan

Aftenposten, 1922

5Q2/3p1P1R/4k1p1/r5p1/4B1P1/8/1B2K3/8

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...d6
      • 2.Qe8#
  • Tries
    • 1.Bf6?
      • threat
        • 2.Qe7#
      • 1...Kxf6
        • 2.Qd6#
      • 1...Ra2+!
    • 1.Qc5?
      • threat
        • 2.Bd5#
        • 2.f8S#
      • 1...d5
        • 2.f8S#
      • 1...d6
        • 2.f8S#
      • 1...Ra8
        • 2.Bd5#
        • 2.Qe5#
      • 1...Rxc5!
    • 1.Qb8?
      • threat
        • 2.f8S#
      • 1...Ke7
        • 2.f8S#
      • 1...Re5
        • 2.Qxe5#
      • 1...Rf5!
  • Keys
    • 1.Rh6!
      • threat
        • 2.Rxg6#
      • 1...d5
        • 2.Bf5#
      • 1...d6
        • 2.Qe8#
      • 1...Rf5
        • 2.gxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(e);SBLOCK::QAR2(G)
  • Tries
    • Try
      • B(A);
      • Threat
        • QAR1(G)
      • Vars
        • K(c);P-FLIGHT,XB(A)::QAR2(G)
      • Refutation
        • R(a);CHECK
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);::P=S
      • Refutation
        • R(a);XQ(G)
    • Try
      • Q(G);
      • Threat
        • P=S
      • Vars
        • K(c);P-FLIGHT::P=S
        • R(a);N_GUARD,P_PINB(C)::QAR1(G),XR(a)
      • Refutation
        • R(a);
  • Actual
    • R(F);P_PINP(d)
    • Threat
      • R(F),XP(d)
    • Vars
      • P(e);SBLOCK,S_CUTR(a)::B(C)
      • P(e);SBLOCK::QAR2(G)
      • R(a);OGATE::P(D),XR(a)
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