MESON Chess Problem Database

Problem Display
PID: 5980 (K1RN3r/4R3/8/3p2n1/1PPk2N1/Q2p2n1/2ppp1BB/b2r4 w - - 0 1)

Larsen, Karl Adolf Koefoed

1st HM., Bristol Times and Mirror, 1926/II

K1RN3r/4R3/8/3p2n1/1PPk2N1/Q2p2n1/2ppp1BB/b2r4

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Bxg1#
    • 1...Bb2
      • 2.Qxb2#
    • 1...Bc3
      • 2.Qa7#
    • 1...Sf1
      • 2.Be5#
    • 1...Sh1
      • 2.Be5#
    • 1...S3e4
      • 2.Be5#
    • 1...Sf5
      • 2.Be5#
    • 1...Sh5
      • 2.Be5#
    • 1...Sh3
      • 2.Se6#
    • 1...S5e4
      • 2.Se6#
    • 1...Se6
      • 2.Sxe6#
    • 1...Sf7
      • 2.Se6#
    • 1...Sh7
      • 2.Se6#
    • 1...c1S
      • 2.Qxa1#
    • 1...e1S
      • 2.Bg1#
    • 1...dxc4
      • 2.Sc6#
      • 2.Rd7#
  • Tries
    • 1.Re3?
      • threat
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...dxc4
        • 2.Sc6#
      • 1...c1S
        • 2.Qxa1#
      • 1...Bc3
        • 2.Qa7#
      • 1...Sf3
        • 2.Se6#
        • 2.Qxd3#
      • 1...e1S!
    • 1.Re4+?
      • 1...S3xe4
        • 2.Be5#
      • 1...S5xe4
        • 2.Se6#
      • 1...dxe4!
    • 1.Re5?
      • threat
        • 2.Rxd5#
      • 1...dxc4
        • 2.Sc6#
        • 2.Rd5#
      • 1...Sf3
        • 2.Se6#
      • 1...Rxd8!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qxd3#
      • 1...S3xe4
        • 2.Be5#
      • 1...S5xe4
        • 2.Se6#
      • 1...dxc4
        • 2.Sc6#
      • 1...dxe4
        • 2.Rd7#
      • 1...c1S
        • 2.Qxa1#
      • 1...e1S
        • 2.Bg1#
      • 1...Bc3
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • R(b);N_GUARD::B(B),XR(b)
    • B(a);N_GUARD::QAB(C),XB(a)
    • B(a);SBLOCK::QAB(C)
    • S(g);OGATE::B(B)
    • S(j);N_GUARD::S(J)
    • S(j);N_GUARD::S(J),XS(j)
    • P(c);S_CUTR(b)::QAB(C),XB(a)
    • P(e);S_CUTR(b)::B(B)
  • Tries
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(i);SBLOCK,XP(E)::S(J)
        • P(c);S_CUTR(b)::QAB(C),XB(a)
        • B(a);SBLOCK::QAB(C)
      • Refutation
        • P(e);
    • Try
      • R(G);CHECK
      • Vars
        • S(g);OGATE,XR(G)::B(B)
        • S(j);XR(G)::S(J)
      • Refutation
        • P(i);XR(G)
    • Try
      • R(G);
      • Threat
        • R1(G),XP(i)
      • Vars
        • S(j);N_GUARD::S(J)
      • Refutation
        • R(k);P_PINR(I),XS(J)
  • Actual
    • B(A);
    • Threat
      • QAR1(C),XP(f)
    • Vars
      • S(g);OGATE,SBLOCK,XB(A)::B(B)
      • S(j);N_GUARD,SBLOCK,XB(A)::S(J)
      • P(i);SBLOCK,XP(E)::S(J)
      • P(i);OGATEB,SBLOCK,XB(A)::R(G)
      • P(c);S_CUTR(b)::QAB(C),XB(a)
      • P(e);S_CUTR(b)::B(B)
      • B(a);SBLOCK::QAB(C)
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