MESON Chess Problem Database

Problem Display
PID: 154562 (1q2NR2/b1n5/1nprp3/1b4p1/p2rk1P1/R2p4/5P1B/Q1N4K w - - 0 1)

Larsen, Karl Adolf Koefoed

1st HM., DSK 11. TT, 1936-1937

1q2NR2/b1n5/1nprp3/1b4p1/p2rk1P1/R2p4/5P1B/Q1N4K

#2

9 + 13

4035 Aarsskrift for DSK 1936
4035 Aarsskrift for DSK 1937
15593 170 Skakopgaver (Jorgensen) 1975

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Qe5#
    • 1...Rc4
      • 2.Qe5#
    • 1...Sbd5
      • 2.Sxd6#
    • 1...d2
      • 2.Sf6#
  • Tries
    • 1.Sxd6+?
      • 1...Rxd6
        • 2.Qe5#
      • 1...Kd5!
    • 1.Rf4+?
      • 1...Kd5
        • 2.Qxd4#
      • 1...Ke5
        • 2.Rxd4#
      • 1...gxf4!
  • Keys
    • 1.Se2!
      • threat
        • 2.Sc3#
      • 1...Kd5
        • 2.Qxd4#
      • 1...dxe2
        • 2.Sf6#
      • 1...Rb4
        • 2.Qe5#
      • 1...Rc4
        • 2.Qe5#
      • 1...R4d5
        • 2.Sg3#
      • 1...Sbd5
        • 2.Sxd6#
      • 1...Scd5
        • 2.Qxd4#
      • 1...d2
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE::QAR1(A)
    • S(g);SBLOCK,S_CUTR(c)::S(H),XR(i)
    • P(a);::S(H)
  • Tries
    • Try
      • S(H);CHECK,XR(i)
      • Vars
        • R(c);OGATE,XS(H)::QAR1(A)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(I);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR1(A),XR(c)
        • K(d);OGATE,P-FLIGHT,P_SPINR(c)::B(E)+R(I),XR(c)
      • Refutation
        • P(f);XR(I)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • K(d);S_FLIGHT::QAR1(A),XR(c)
      • P(a);XS(B)::S(H)
      • R(c);OGATE::QAR1(A)
      • R(c);SBLOCK::S(B)
      • S(g);SBLOCK,S_CUTR(c)::S(H),XR(i)
      • S(l);S_CUTR(i)::QAR1(A),XR(c)
      • P(a);::S(H)
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