MESON Chess Problem Database

Problem Display
PID: 18704 (4RR2/pQ4K1/1p1Nb3/q1brkN2/1p4P1/1B3P2/2Pr1P2/2B5 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

3rd HM., Skakbladet, 1957

4RR2/pQ4K1/1p1Nb3/q1brkN2/1p4P1/1B3P2/2Pr1P2/2B5

#2

12 + 9

3976 FIDE Album (1956-1958) 1961

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Sc4#
      • 2.Sf7#
      • 2.f4#
    • 1...Rxc2
      • 2.Sf7#
      • 2.Qxd5#
      • 2.f4#
    • 1...Re2
      • 2.Sc4#
      • 2.Sf7#
      • 2.Qxd5#
      • 2.f4#
    • 1...Rxf2
      • 2.Sc4#
      • 2.Sf7#
      • 2.Qxd5#
    • 1...R2d3
      • 2.Sc4#
      • 2.Sf7#
      • 2.f4#
    • 1...R2d4
      • 2.Sf7#
    • 1...R5d3
      • 2.Qe4#
    • 1...Rxd6
      • 2.Qe4#
  • Tries
    • 1.Rxe6+?
      • 1...Kxe6
        • 2.Re8#
        • 2.Qe7#
      • 1...Kf4!
    • 1.Qxd5+?
      • 1...Rxd5
        • 2.Sc4#
        • 2.Sf7#
        • 2.f4#
      • 1...Kf4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qxd5#
      • 1...Kxd4
        • 2.Bb2#
      • 1...Kxd6
        • 2.Rxe6#
      • 1...R2xd4
        • 2.Sf7#
      • 1...R5xd4
        • 2.Rxe6#
      • 1...Rxd6
        • 2.Qe4#
      • 1...Bxd4
        • 2.Sc4#
      • 1...Bxd6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(a);::S(H)
    • R(e);OGATE::QAR1(I)
    • R(e);OGATE,XS(H)::QAR1(I)
  • Tries
    • Try
      • R(K);CHECK,XB(h)
      • Refutation
        • K(f);P_SPINR(a),S_FLIGHT
    • Try
      • Q(I);CHECK,XR(e)
      • Refutation
        • K(f);N_SPINB(h),P_SPINR(a),S_FLIGHT
  • Actual
    • S(G);
    • Threat
      • QAR1(I),XR(e)
    • Vars
      • K(f);N_SPINB(h),OGATEB,S_FLIGHT,XS(G)::B(A)
      • K(f);N_SPINB(h),S_FLIGHT,XS(H)::R1(K),XB(h)
      • R(a);SBLOCK,XS(G)::S(H)
      • R(e);SBLOCK,XS(G)::R1(K),XB(h)
      • R(e);OGATE,SBLOCK,XS(H)::QAR1(I)
      • B(d);SBLOCK,XS(G)::S(H)
      • B(d);SBLOCK,XS(H)::S(G)
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