MESON Chess Problem Database

Problem Display
PID: 180355 (4R3/8/8/K4N2/2N4B/5P2/1pB1brP1/1Rn1kn1Q w - - 0 1)

Lider, Valentin Viktorovich

3rd HM., Sachove umeni (Ceskoslovensky sach), 1974-09

4R3/8/8/K4N2/2N4B/5P2/1pB1brP1/1Rn1kn1Q

#2

10 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sfe3?
      • 1...Bxf3
        • 2.Qxf1#
      • 1...Bxc4
        • 2.Sxc4#
      • 1...Bd1
        • 2.Qxf1#
      • 1...Bd3!
    • 1.Bd1?
      • 1...Sb3+
        • 2.Bxb3#
      • 1...Sa2
        • 2.Rxe2#
      • 1...Sd3
        • 2.Rxe2#
      • 1...Kxd1!
  • Keys
    • 1.Sg3!
      • 1...Rxg2
        • 2.Qxf1#
      • 1...Rxf3
        • 2.Rxe2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(I);N_PINB(e)
      • Vars
        • B(e);N_GUARD,XP(E)::QAR1(B),XS(c)
        • B(e);XS(F)::R(J)+S(I),XB(e)
        • B(e);N_GUARD,N_SPINS(a),P_SPINS(c)::QAR1(B),XS(c)
      • Refutation
        • B(e);
    • Try
      • B(C);N_PINS(a),P_PINS(c)
      • Vars
        • S(a);CHECK,OGATEB::R(A)+B(C),XS(a)
        • S(a);N_GUARD::R1(J),XB(e)
      • Refutation
        • K(b);N_SPINB(e),N_SPINR(f),N_SPINS(c),P-FLIGHT,P_SPINS(a),XB(C)
  • Actual
    • S(I);N_PINR(f)
    • Vars
      • R(f);N_GUARD,XP(D)::QAR1(B),XS(c)
      • R(f);N_GUARD,XP(E)::R1(J),XB(e)
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