MESON Chess Problem Database

Problem Display
PID: 247391 (6K1/2N4p/p7/1P1R1pn1/qRb1kP1b/2n1P1pr/6N1/5Q2 w - - 0 1)

Hjelle, David

Stella Polaris, 1968

6K1/2N4p/p7/1P1R1pn1/qRb1kP1b/2n1P1pr/6N1/5Q2

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Rxc4#
    • 1...Qa1
      • 2.Rxc4#
    • 1...Qa3
      • 2.Rxc4#
    • 1...Qa5
      • 2.Rxc4#
    • 1...Sf3
      • 2.Qd3#
    • 1...Se6
      • 2.Re5#
    • 1...Sf7
      • 2.Rd4#
  • Tries
    • 1.fxg5?
      • threat
        • 2.Qf4#
        • 2.Qxf5#
      • 1...Bxg5
        • 2.Qxf5#
      • 1...Se2
        • 2.Qxf5#
      • 1...f4
        • 2.Qxf4#
      • 1...Sxd5!
  • Keys
    • 1.Se8!
      • threat
        • 2.Sf6#
      • 1...Kxd5
        • 2.Qxc4#
      • 1...Sxd5
        • 2.Sd6#
      • 1...Sf3
        • 2.Qd3#
      • 1...Se6
        • 2.Re5#
      • 1...Sf7
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(d);N_GUARD::R(D),XB(e)
    • S(i);SBLOCK::QAB1(A)
    • S(i);N_PINR(G)::R1(G)
  • Tries
    • Try
      • P(E);XS(i)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);XP(E)::QAB1(A),XP(h)
        • S(a);::QAB1(A),XP(h)
        • P(h);::QAR1(A),XP(h)
      • Refutation
        • S(a);XR(G)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(f);N_SPINB(e),S_FLIGHT,XR(G)::QAB1(A),XB(e)
      • S(a);SBLOCK,XR(G)::S(H)
      • S(i);SBLOCK::QAB1(A)
      • S(i);N_PINR(G)::R1(G)
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Developed and maintained by Brian Stephenson.
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