MESON Chess Problem Database

Problem Display
PID: 58488 (1NqR4/2pb1pK1/4P3/2P1k1PR/3pPp2/3Q3B/1bN5/4B3 w - - 0 1)

Xenakis, John

Chess Life, 1959

1NqR4/2pb1pK1/4P3/2P1k1PR/3pPp2/3Q3B/1bN5/4B3

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Sxd7#
    • 1...Qb7
      • 2.Sxd7#
    • 1...Bc1
      • 2.Qxd4#
    • 1...Ba3
      • 2.Qxd4#
    • 1...Ba4
      • 2.Rd5#
    • 1...Bb5
      • 2.Rd5#
    • 1...Bc6
      • 2.Sxc6#
    • 1...Bxe6
      • 2.Sc6#
    • 1...Be8
      • 2.Rd5#
    • 1...f3
      • 2.Bg3#
    • 1...fxe6
      • 2.g6#
    • 1...f5
      • 2.gxf5 ep#
    • 1...f6
      • 2.gxf6#
  • Tries
    • 1.Sa3?
      • threat
        • 2.Sc4#
      • 1...Bxe6
        • 2.Sc6#
      • 1...f3
        • 2.Bg3#
      • 1...f5
        • 2.gxf5 ep#
      • 1...Qa6
        • 2.Sxd7#
      • 1...Bb5
        • 2.Rd5#
      • 1...Bxa3!
    • 1.Sxd4?
      • threat
        • 2.Sf3#
      • 1...f3
        • 2.Bg3#
      • 1...f5
        • 2.gxf5 ep#
      • 1...Bxd4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sc4#
      • 1...Bxe6
        • 2.Sc6#
      • 1...dxe3
        • 2.Qd5#
      • 1...fxe3
        • 2.Bg3#
      • 1...f3
        • 2.Bg3#
      • 1...f5
        • 2.gxf5 ep#
      • 1...Qa6
        • 2.Sxd7#
      • 1...Bb5
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(h);N_GUARD::S(K),XB(f)
    • B(a);N_GUARD::QAB1(C),XP(b)
    • B(f);OGATE::R1(L)
    • B(f);N_GUARD::S(K),XB(f)
    • B(f);N_GUARD,XP(I)::S(K)
    • P(c);OGATEB::B(A)
    • P(g);N_GUARD,XP(I)::R(H)+P(G)
    • P(g);OGATE::R(H)+P(G),XP(g),EP
    • P(g);OGATE::R(H)+P(G),XP(g)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • B(f);N_GUARD,XP(I)::S(K)
        • P(c);OGATEB::B(A)
        • P(g);OGATE::R(H)+P(G),XP(g),EP
        • Q(h);N_GUARD::S(K),XB(f)
        • B(f);OGATE::R1(L)
      • Refutation
        • B(a);XS(B)
    • Try
      • S(B);XP(b)
      • Threat
        • S(B)
      • Vars
        • P(c);OGATEB::B(A)
        • P(g);OGATE::R(H)+P(G),XP(g),EP
      • Refutation
        • B(a);XS(B)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • B(f);N_GUARD,XP(I)::S(K)
      • P(b);OGATE,XS(B)::QAR1(C)
      • P(c);OGATEB,XS(B)::B(A)
      • P(c);OGATEB::B(A)
      • P(g);OGATE::R(H)+P(G),XP(g),EP
      • Q(h);N_GUARD::S(K),XB(f)
      • B(f);OGATE::R1(L)
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