MESON Chess Problem Database

Problem Display
PID: 239271 (3r4/1B3Rnb/2n1p3/R1Nk4/2p1prN1/2p4Q/2K2p1B/b7 w - - 0 1)

Pituk, Alexander

Sachove umeni (Ceskoslovensky sach), 1960

3r4/1B3Rnb/2n1p3/R1Nk4/2p1prN1/2p4Q/2K2p1B/b7

#2

8 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Sb3#
    • 1...Rxg4
      • 2.Sb3#
    • 1...Rf5
      • 2.Sb3#
    • 1...Rf6
      • 2.Sb3#
    • 1...Rxf7
      • 2.Sb3#
    • 1...Rd6
      • 2.Sb3#
    • 1...Rd7
      • 2.Rxd7#
    • 1...Ra8
      • 2.Rd7#
    • 1...Rb8
      • 2.Rd7#
    • 1...Rc8
      • 2.Rd7#
    • 1...Re8
      • 2.Rd7#
    • 1...Rf8
      • 2.Rd7#
    • 1...Rg8
      • 2.Rd7#
    • 1...Rh8
      • 2.Rd7#
  • Tries
    • 1.Sd3+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kd6!
    • 1.Sa4+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kd6!
    • 1.Sa6+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kd6!
    • 1.Sd7+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kd6!
  • Keys
    • 1.Sxe4+!
      • 1...Kd4
        • 2.Qe3#
      • 1...Kxe4
        • 2.Rxf4#
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 14
  • Sets
    • R(f);::R(E)+S(F)
    • R(f);XS(D)::R(E)+S(F)
    • R(f);XR(H)::R(E)+S(F)
    • R(l);SBLOCK::R(E)+S(F)
    • R(l);N_GUARD::R(H),XR(l)
    • R(l);N_GUARD::R(H)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(g);N_SPINS(h),P-FLIGHT::QAB1(C)
      • Refutation
        • K(g);N_SPINS(h),P-FLIGHT,P_SPINR(f)
    • Try
      • S(F);CHECK
      • Vars
        • K(g);N_SPINS(h),P-FLIGHT::QAB1(C)
      • Refutation
        • K(g);N_SPINS(h),P-FLIGHT,P_SPINR(f)
    • Try
      • S(F);CHECK
      • Vars
        • K(g);N_SPINS(h),P-FLIGHT::QAB1(C)
      • Refutation
        • K(g);N_SPINS(h),P-FLIGHT,P_SPINR(f)
    • Try
      • S(F);CHECK
      • Vars
        • K(g);N_SPINS(h),P-FLIGHT::QAB1(C)
      • Refutation
        • K(g);N_SPINS(h),P-FLIGHT,P_SPINR(f)
  • Actual
    • S(F);CHECK,P_SPINS(F),XP(e)
    • Vars
      • K(g);N_SPINS(h),P-FLIGHT::QAB1(C)
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Developed and maintained by Brian Stephenson.
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