MESON Chess Problem Database

Problem Display
PID: 241420 (QK6/2R1p3/1P1Pk1pN/4P2p/2N1pn1b/7r/B5r1/B4q2 w - - 0 1)

Hjelle, David

Arbejder-Skak, 1950

QK6/2R1p3/1P1Pk1pN/4P2p/2N1pn1b/7r/B5r1/B4q2

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg5
      • 2.Rxe7#
    • 1...Be1
      • 2.Rxe7#
    • 1...Bf2
      • 2.Rxe7#
    • 1...Bg3
      • 2.Rxe7#
    • 1...Se2
      • 2.Se3#
    • 1...Sd3
      • 2.Sd2#
    • 1...g5
      • 2.Rxe7#
  • Tries
    • 1.Qd5+?
      • 1...Kxd5
        • 2.Se3#
      • 1...Sxd5!
  • Keys
    • 1.Kb7!
      • threat
        • 2.Qg8#
      • 1...Kd5
        • 2.Se3#
      • 1...Se2
        • 2.Se3#
      • 1...Sd3
        • 2.Sd2#
      • 1...Sd5
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(b);S_CUTB(f)::R1(H),XP(j)
    • B(f);N_GUARD::R1(H),XP(j)
    • S(e);N_GUARD,S_CUTQ(a),S_CUTR(b)::B(B)+S(C)
    • S(e);N_GUARD,S_CUTQ(a),S_CUTR(c)::B(B)+S(C)
    • P(i);S_CUTB(f)::R1(H),XP(j)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • K(h);S_FLIGHT,XQ(I)::B(B)+S(C),DCHECK
      • Refutation
        • S(e);XQ(I)
  • Actual
    • K(J);P-FLIGHT
    • Threat
      • QAB(I)
    • Vars
      • K(h);S_FLIGHT::B(B)+S(C),DCHECK
      • S(e);N_GUARD,S_CUTQ(a),S_CUTR(b)::B(B)+S(C)
      • S(e);N_GUARD,S_CUTQ(a),S_CUTR(c)::B(B)+S(C)
      • S(e);SBLOCK::QAB(I)
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