MESON Chess Problem Database

Problem Display
PID: 138081 (8/2N1p2B/7Q/3ppn2/N3P3/3kbR2/K5R1/4B3 w - - 0 1)

Yaroslavtsev, Arkady Ivanovich

2nd Comm., Trud, 1947

8/2N1p2B/7Q/3ppn2/N3P3/3kbR2/K5R1/4B3

#2

9 + 6

14752 Soviet Chess Compositions (1945-1947) 1949

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qxe3#
    • 1...Sd4
      • 2.Sb2#
  • Tries
    • 1.Sb2+?
      • 1...Kxe4
        • 2.Qxe3#
      • 1...Kd4!
    • 1.Rd2+?
      • 1...Kxe4
        • 2.Rxe3#
        • 2.Qxe3#
      • 1...Kc4!
    • 1.Qxe3+?
      • 1...Kc4
        • 2.Sb2#
        • 2.Sb6#
        • 2.Rc2#
        • 2.Qc5#
        • 2.Qc3#
        • 2.Qd3#
      • 1...Sxe3!
    • 1.Qc6?
      • 1...Kd4
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Qxd5#
      • 1...dxe4
        • 2.Rd2#
        • 2.Qc3#
      • 1...d4
        • 2.Sb2#
        • 2.Rd2#
        • 2.Qc2#
      • 1...Sg3
        • 2.Rd2#
        • 2.Qxd5#
        • 2.Qc3#
      • 1...Sd4
        • 2.Sb2#
        • 2.Rd2#
        • 2.Qc3#
      • 1...Sh4
        • 2.Rd2#
        • 2.Qxd5#
        • 2.Qc3#
      • 1...Sd6
        • 2.Rd2#
        • 2.Qxd5#
        • 2.Qc3#
      • 1...Sh6
        • 2.Rd2#
        • 2.Qxd5#
        • 2.Qc3#
      • 1...Sg7
        • 2.Rd2#
        • 2.Qxd5#
        • 2.Qc3#
      • 1...e6!
  • Keys
    • 1.Qe6!
      • 1...Kc4
        • 2.Qxd5#
      • 1...Kd4
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Qxd5#
      • 1...dxe4
        • 2.Rd2#
      • 1...d4
        • 2.Sc5#
      • 1...Sg3
        • 2.Qxd5#
      • 1...Sd4
        • 2.Sb2#
      • 1...Sh4
        • 2.Qxd5#
      • 1...Sd6
        • 2.Qxd5#
      • 1...Sh6
        • 2.Qxd5#
      • 1...Sg7
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINB(b),P_SPINS(e),S_FLIGHT,XP(F)::QAR1(G),XB(b)
    • S(e);SBLOCK::S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(a);N_SPINB(b),P_SPINS(e),S_FLIGHT,XP(F)::QAR1(G),XB(b)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • Q(G);CHECK,XB(b)
      • Refutation
        • S(e);P_SPINS(e),XQ(G)
    • Try
      • Q(G);
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::QAR1(G),XP(c)
        • K(a);N_SPINB(b),P_SPINP(c),P_SPINS(e),S_FLIGHT,XP(F)::QAB1(G),XP(c)
      • Refutation
        • P(f);
  • Actual
    • Q(G);
    • Vars
      • K(a);N_SPINB(b),P_SPINP(c),S_FLIGHT::QAB1(G),XP(c)
      • K(a);N_SPINB(b),P-FLIGHT::QAR1(G),XP(c)
      • K(a);N_SPINB(b),P_SPINP(d),P_SPINS(e),S_FLIGHT,XP(F)::QAB1(G),XP(c)
      • P(c);SBLOCK,XP(F)::R1(C)
      • P(c);SBLOCK::S(E)
      • S(e);N_GUARD::QAR2(G),XP(c)
      • S(e);SBLOCK::S(E)
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