MESON Chess Problem Database

Problem Display
PID: 197923 (2b1NK2/1p3p2/1Pp1k3/3R2p1/BP2p3/2N1P1B1/8/8 w - - 0 1)

Poulsen, Erik

Stella Polaris, 1966

2b1NK2/1p3p2/1Pp1k3/3R2p1/BP2p3/2N1P1B1/8/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bd7
      • 2.Re5#
    • 1...c5
      • 2.Re5#
    • 1...f5
      • 2.Rd6#
    • 1...f6
      • 2.Sc7#
      • 2.Sg7#
  • Tries
    • 1.Sxe4?
      • threat
        • 2.Sc7#
      • 1...cxd5
        • 2.Sg7#
      • 1...Kxd5!
    • 1.Sb5?
      • threat
        • 2.Sbc7#
      • 1...Kxd5
        • 2.Bb3#
      • 1...cxd5
        • 2.Sd4#
      • 1...cxb5!
    • 1.Bxc6?
      • threat
        • 2.Re5#
      • 1...f6
        • 2.Sc7#
        • 2.Sg7#
      • 1...bxc6!
  • Keys
    • 1.Se2!
      • 1...Kxd5
        • 2.Bb3#
      • 1...cxd5
        • 2.Sd4#
      • 1...g4
        • 2.Sf4#
      • 1...Bd7
        • 2.Re5#
      • 1...c5
        • 2.Re5#
      • 1...f5
        • 2.Rd6#
      • 1...f6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(g);SBLOCK::R1(F)
    • P(c);::R1(F)
    • P(f);SBLOCK::R1(F)
  • Tries
    • Try
      • S(A);XP(a)
      • Threat
        • S(H)
      • Vars
        • P(c);SBLOCK,XR(F)::S(H)
      • Refutation
        • K(d);S_FLIGHT,XR(F)
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XR(F)::B(D)
        • P(c);SBLOCK,XR(F)::S(A)
      • Refutation
        • P(c);XS(A)
    • Try
      • B(D);XP(c)
      • Threat
        • R1(F)
      • Refutation
        • P(e);XB(D)
  • Actual
    • S(A);
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(F)::B(D)
      • P(c);SBLOCK,XR(F)::S(A)
      • P(b);N_GUARD::S(A)
      • B(g);SBLOCK::R1(F)
      • P(c);::R1(F)
      • P(f);SBLOCK::R1(F)
      • P(f);SBLOCK::S(H)
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