MESON Chess Problem Database

Problem Display
PID: 16594 (2RRrb2/2n3p1/2P3Qr/Kpk5/p1N2nb1/2PP4/4pN1B/7B w - - 0 1)

Ekstrom, Sven Johan Adrian

1st Prize, Schackvarlden, 1941

2RRrb2/2n3p1/2P3Qr/Kpk5/p1N2nb1/2PP4/4pN1B/7B

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Sxe4#
    • 1...Be7
      • 2.Se4#
    • 1...Se6
      • 2.Se4#
    • 1...bxc4
      • 2.d4#
    • 1...b4
      • 2.cxb4#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Sb7#
        • 2.d4#
      • 1...Bxc8
        • 2.d4#
      • 1...Sxd3
        • 2.Sxd3#
      • 1...Re4
        • 2.Sdxe4#
        • 2.Sb7#
      • 1...Bf3
        • 2.Sb7#
      • 1...Sg2
        • 2.Sb7#
      • 1...Sfd5
        • 2.Sb7#
      • 1...Sfe6
        • 2.Sb7#
      • 1...Sce6
        • 2.Sde4#
        • 2.Sb7#
      • 1...Bxd6!
  • Keys
    • 1.Sb6!
      • threat
        • 2.d4#
      • 1...Rxd8
        • 2.Se4#
      • 1...Sxd3
        • 2.Sxd3#
      • 1...Sfe6
        • 2.Sd7#
      • 1...Re4
        • 2.Sxe4#
      • 1...Sce6
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(j);N_GUARD::S(B),XR(j)
    • B(k);S_CUTR(j)::S(B)
    • S(h);S_CUTR(j)::S(B)
    • P(e);SBLOCK,XS(F)::P(E)
    • P(e);OGATE::P(D),XP(e)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(d);XR(J)::P(E)
        • S(c);XP(E)::S(B),XS(c)
        • B(d);::S(F)
        • S(c);::S(F)
      • Refutation
        • B(k);XS(F)
  • Actual
    • S(F);
    • Threat
      • P(E)
    • Vars
      • R(j);N_GUARD,XR(K)::S(B)
      • S(c);XP(E)::S(B),XS(c)
      • S(c);S_CUTB(d)::S(F)
      • R(j);N_GUARD::S(B),XR(j)
      • S(h);S_CUTR(j)::S(B)
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