MESON Chess Problem Database

Problem Display
PID: 241422 (5RK1/2p5/2Q1p3/1p1qN1p1/R1r1kNp1/4p1P1/1B2P3/8 w - - 0 1)

Hjelle, David

Arbejder-Skak, 1951

5RK1/2p5/2Q1p3/1p1qN1p1/R1r1kNp1/4p1P1/1B2P3/8

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Rxb4#
    • 1...gxf4
      • 2.Rxf4#
  • Tries
    • 1.Sxd5?
      • threat
        • 2.Sf4#
        • 2.Sb6#
        • 2.Sxc7#
        • 2.Se7#
      • 1...bxa4
        • 2.Qxc4#
      • 1...exd5
        • 2.Qg6#
      • 1...b4
        • 2.Qxc4#
      • 1...Rd4!
    • 1.Sf3?
      • threat
        • 2.Sxg5#
      • 1...e5+
        • 2.Qxd5#
      • 1...gxf4
        • 2.Sg5#
        • 2.Rxf4#
      • 1...Rd4
        • 2.Rxd4#
        • 2.Qc2#
      • 1...gxf3!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sxg5#
      • 1...Kf5
        • 2.Sd6#
      • 1...gxf4
        • 2.Sg5#
      • 1...Rd4
        • 2.Qc2#
      • 1...e5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(b);OGATEB::R(D),XR(b)
    • P(g);OGATE,XS(E)::R1(H),XP(g)
  • Tries
    • Try
      • S(E);XQ(f)
      • Threat
        • DUALS(4)
      • Vars
        • P(e);N_GUARD,N_SPINR(b),XR(D)::QAR2(G),XR(b)
        • P(h);OGATE,P_SPINP(h),SBLOCK,XS(E)::QAB(G)
        • P(e);N_GUARD,N_SPINR(b)::QAR2(G),XR(b)
      • Refutation
        • R(b);
    • Try
      • S(F);
      • Threat
        • S(F),XP(g)
      • Vars
        • P(h);CHECK,N_GUARD::QAB1(G),XQ(f)
      • Refutation
        • P(d);XS(F)
  • Actual
    • S(F);
    • Threat
      • S(F),XP(g)
    • Vars
      • K(c);N_SPINQ(f),N_SPINR(b),S_FLIGHT::R(H)+S(F),DCHECK
      • P(g);XS(E)::S(F)
      • R(b);OGATE::QAB(G)
      • P(h);OGATE,P_PINS(F)::QAB(G)
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