MESON Chess Problem Database

Problem Display
PID: 241411 (3KR3/5pp1/B7/2pkp3/2NNpQ2/Bn1n4/1r2P2b/2rR4 w - - 0 1)

Hjelle, David

Arbejder-Skak, 1950

3KR3/5pp1/B7/2pkp3/2NNpQ2/Bn1n4/1r2P2b/2rR4

#2

9 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Rxd3#
    • 1...Se1
      • 2.Rxe5#
      • 2.Qxf7#
    • 1...Sf2
      • 2.Rxe5#
      • 2.Qxf7#
    • 1...Sb4
      • 2.Rxe5#
      • 2.Qxf7#
    • 1...Sxf4
      • 2.Rxe5#
    • 1...exd4
      • 2.Qxe4#
  • Tries
    • 1.Se3+?
      • 1...Kxd4
        • 2.Rxd3#
      • 1...Kd6!
    • 1.Sb6+?
      • 1...Kxd4
        • 2.Rxd3#
      • 1...Kd6!
    • 1.Rxe5+?
      • 1...Kxd4
        • 2.Rxd3#
      • 1...Sxe5!
  • Keys
    • 1.Kc7!
      • threat
        • 2.Rd8#
      • 1...Kxd4
        • 2.Rxd3#
      • 1...Sxd4
        • 2.Se3#
      • 1...cxd4
        • 2.Qxf7#
      • 1...exd4
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(h);OGATEB,P-FLIGHT,P_SPINP(f),P_SPINS(e),XS(E)::R1(A),XS(e)
    • S(e);N_GUARD,XQ(F)::R1(I),XP(i)
    • P(i);XS(E)::QAB1(F),XP(f)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(h);P-FLIGHT,P_SPINP(f),P_SPINS(e),XS(E)::R1(A),XS(e)
      • Refutation
        • K(h);P-FLIGHT,P_SPINP(g)
    • Try
      • S(D);CHECK
      • Vars
        • K(h);P-FLIGHT,P_SPINP(f),P_SPINS(e),XS(E)::R1(A),XS(e)
      • Refutation
        • K(h);P-FLIGHT,P_SPINP(g)
    • Try
      • R(I);CHECK,XP(i)
      • Vars
        • K(h);P-FLIGHT,P_SPINP(f),P_SPINS(e),XS(E)::R1(A),XS(e)
      • Refutation
        • S(e);XR(I)
  • Actual
    • K(H);S_FLIGHT
    • Threat
      • R(I)
    • Vars
      • K(h);OGATEB,P-FLIGHT,P_SPINP(f),P_SPINS(e),XS(E)::R1(A),XS(e)
      • S(d);SBLOCK,XS(E)::S(D)
      • P(g);P_PINS(D),SBLOCK,XS(E)::QAB(F),XP(j)
      • P(i);P_PINQ(F),SBLOCK,XS(E)::S(D)
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