MESON Chess Problem Database

Problem Display
PID: 119841 (6Q1/8/P1PqR1N1/1nrk2P1/2p3K1/2P5/8/8 w - - 0 1)

Shoshin, Aleksandr Ivanovich

Barmens Schackfor., 1905

6Q1/8/P1PqR1N1/1nrk2P1/2p3K1/2P5/8/8

#2

8 + 5

6490 yacpdb 2009
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Se7#
    • 1...Qf4+
      • 2.Sxf4#
    • 1...Qe7
      • 2.Sf4#
      • 2.Sxe7#
    • 1...Qb8
      • 2.Se7#
    • 1...Qxc6
      • 2.Sf4#
      • 2.Se7#
    • 1...Qd7
      • 2.Sf4#
    • 1...Qd8
      • 2.Sf4#
    • 1...Rxc6
      • 2.Re5#
  • Tries
    • 1.Re1+?
      • 1...Qe6+
        • 2.Qxe6#
      • 1...Kxc6!
    • 1.Re2+?
      • 1...Qe6+
        • 2.Qxe6#
      • 1...Kxc6!
    • 1.Re3+?
      • 1...Qe6+
        • 2.Qxe6#
      • 1...Kxc6!
    • 1.Re7+?
      • 1...Qe6+
        • 2.Qxe6#
      • 1...Kxc6!
    • 1.Re8+?
      • 1...Qe6+
        • 2.Qxe6#
      • 1...Kxc6!
  • Keys
    • 1.Qd8!
      • 1...Kxc6
        • 2.Se7#
      • 1...Kxe6
        • 2.Qg8#
      • 1...Qxd8
        • 2.Sf4#
      • 1...Rxc6
        • 2.Re5#
      • 1...Sxc3
        • 2.Qxd6#
      • 1...Qd7
        • 2.Sf4#
      • 1...Sa3
        • 2.Qxd6#
      • 1...Sd4
        • 2.Qxd6#
      • 1...Sa7
        • 2.Qxd6#
      • 1...Sc7
        • 2.Qxd6#

This anticipates 194285(1917)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_GUARD::S(G)
    • Q(e);CHECK,N_GUARD::S(G),XQ(e)
    • Q(e);N_GUARD,P_PINR(F)::S(G)
    • R(c);SBLOCK,XP(E)::QAB(H)+R(F),DCHECK
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • Q(e);CHECK,N_GUARD,P_SPINQ(e)::QAB1(H),XQ(e)
      • Refutation
        • K(d);S_FLIGHT,XP(E)
    • Try
      • R(F);CHECK
      • Vars
        • Q(e);CHECK,N_GUARD,P_SPINQ(e)::QAB1(H),XQ(e)
      • Refutation
        • K(d);S_FLIGHT,XP(E)
    • Try
      • R(F);CHECK
      • Vars
        • Q(e);CHECK,N_GUARD,P_SPINQ(e)::QAB1(H),XQ(e)
      • Refutation
        • K(d);S_FLIGHT,XP(E)
    • Try
      • R(F);CHECK
      • Vars
        • Q(e);CHECK,N_GUARD,P_SPINQ(e)::QAB1(H),XQ(e)
      • Refutation
        • K(d);S_FLIGHT,XP(E)
    • Try
      • R(F);CHECK
      • Vars
        • Q(e);CHECK,N_GUARD,P_SPINQ(e)::QAB1(H),XQ(e)
      • Refutation
        • K(d);S_FLIGHT,XP(E)
  • Actual
    • Q(H);P_PINQ(e)
    • Vars
      • K(d);S_FLIGHT,XP(E)::S(G)
      • K(d);N_SPINQ(e),OGATEB,S_FLIGHT,XR(F)::QAB(H)
      • Q(e);N_SPINQ(e),XQ(H)::S(G)
      • R(c);SBLOCK,XP(E)::R1(F)
      • S(b);N_GUARD,XP(A)::QAR1(H),XQ(e)
      • Q(e);P_PINR(F)::S(G)
      • S(b);N_GUARD::QAR1(H),XQ(e)
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