MESON Chess Problem Database

Problem Display
PID: 134876 (4N3/8/1n3Q2/pr2NK2/p1pk4/R1R5/8/8 w - - 0 1)

Kolodnas, Zelikas

Die Schwalbe, 1928

4N3/8/1n3Q2/pr2NK2/p1pk4/R1R5/8/8

#2

6 + 6

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qd6#
    • 1...Kd5
      • 2.Qd6#
    • 1...Rxe5+
      • 2.Qxe5#
    • 1...Sd5
      • 2.Rxc4#
  • Tries
    • 1.Rd3+?
      • 1...Kc5
        • 2.Qe7#
        • 2.Qd6#
        • 2.Qf8#
      • 1...cxd3!
    • 1.Rxc4+?
      • 1...Kd5
        • 2.Sc7#
        • 2.Rd3#
        • 2.Qc6#
        • 2.Qd6#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Sxc4!
    • 1.Qd6+?
      • 1...Sd5
        • 2.Sf3#
        • 2.Sc6#
        • 2.Rxc4#
      • 1...Rd5!
  • Keys
    • 1.Sc7!
      • 1...Rxe5+
        • 2.Qxe5#
      • 1...Kc5
        • 2.Sd3#
      • 1...Rb3
        • 2.Sd7#
      • 1...Rb1
        • 2.Sd7#
      • 1...Rb2
        • 2.Sd7#
      • 1...Rb4
        • 2.Sd7#
      • 1...Rc5
        • 2.Qh4#
      • 1...Rd5
        • 2.Se6#
      • 1...Sd5
        • 2.Se6#
        • 2.Rxc4#
      • 1...Sd7
        • 2.Rxc4#
      • 1...Sa8
        • 2.Rxc4#
      • 1...Sc8
        • 2.Rxc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • K(c);N_PINS(C),P_SPINP(b),S_FLIGHT::QAB1(E)
    • K(c);N_PINS(C),P-FLIGHT::QAR1(E)
    • R(e);CHECK,OGATE,P_SPINR(e),XS(C)::QAB1(E),XR(e)
    • S(f);N_GUARD,N_PINS(C),SBLOCK::R1(B),XP(b)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • P(b);XR(B)
    • Try
      • R(B);CHECK,XP(b)
      • Refutation
        • S(f);XR(B)
    • Try
      • Q(E);CHECK
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • S(F);
    • Vars
      • R(e);CHECK,OGATE,P_SPINR(e),XS(C)::QAB1(E),XR(e)
      • K(c);N_PINS(C),P_SPINP(b),S_FLIGHT::S(C)
      • R(e);N_PINS(C)::QAB(E)+S(C)
      • R(e);SBLOCK::QAR(E)
      • R(e);SBLOCK::S(F)
      • S(f);N_GUARD::R1(B),XP(b)
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Developed and maintained by Brian Stephenson.
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