MESON Chess Problem Database

Problem Display
PID: 40709 (8/8/3R1P1K/3NpNR1/2ppkp2/2p5/2P1nQP1/6n1 w - - 0 1)

Barnes, Barry Peter

Comm., British Chess Magazine, 1962

8/8/3R1P1K/3NpNR1/2ppkp2/2p5/2P1nQP1/6n1

#2

9 + 8

4199 Barnes about Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Qxe2#
      • 2.Qxf3#
      • 2.gxf3#
    • 1...Sh3
      • 2.Qxe2#
      • 2.Qf3#
  • Tries
    • 1.Sxf4?
      • 1...Sxf4
        • 2.Sg3#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sc1
        • 2.Sg3#
      • 1...Sh3
        • 2.Qf3#
      • 1...Sg3
        • 2.Sxg3#
      • 1...d3
        • 2.Qe3#
      • 1...exf4!
    • 1.Sg3+?
      • 1...fxg3
        • 2.Qf5#
      • 1...Sxg3!
    • 1.Sxd4?
      • 1...Sxd4
        • 2.Sxc3#
      • 1...exd4
        • 2.Re6#
      • 1...Sc1
        • 2.Sxc3#
      • 1...Sf3
        • 2.gxf3#
      • 1...Sg3
        • 2.Sxc3#
      • 1...f3
        • 2.Qe3#
      • 1...Sh3!
    • 1.Qxd4+?
      • 1...Sxd4
        • 2.Sxc3#
      • 1...exd4!
    • 1.Qxf4+?
      • 1...Sxf4
        • 2.Sg3#
      • 1...exf4!
  • Keys
    • 1.Qe1!
      • 1...Sf3
        • 2.Qxe2#
      • 1...Sh3
        • 2.Qxe2#
      • 1...d3
        • 2.Sxc3#
      • 1...f3
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);XP(g)
      • Vars
        • S(b);N_GUARD,XS(D)::S(E)
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(b);N_GUARD::S(E)
        • S(a);N_GUARD::QAB1(B)
        • S(b);N_GUARD::S(E),XS(b)
        • P(e);N_GUARD::QAR1(B)
      • Refutation
        • P(h);XS(D)
    • Try
      • S(E);CHECK
      • Vars
        • P(g);OGATE,XS(E)::QAB1(B)
      • Refutation
        • S(b);XS(E)
    • Try
      • S(E);XP(e)
      • Vars
        • S(b);N_GUARD,XS(E)::S(D),XP(c)
        • P(h);OGATEB,XS(E)::R(G)
        • S(b);N_GUARD::S(D),XP(c)
        • S(a);OGATE::P(C),XS(a)
        • P(g);N_GUARD::QAR1(B)
      • Refutation
        • S(a);
    • Try
      • Q(B);CHECK,XP(e)
      • Vars
        • S(b);XQ(B)::S(D),XP(c)
      • Refutation
        • P(h);XQ(B)
    • Try
      • Q(B);CHECK,XP(g)
      • Vars
        • S(b);XQ(B)::S(E)
      • Refutation
        • P(h);XQ(B)
  • Actual
    • Q(B);P_PINS(b)
    • Vars
      • S(a);N_GUARD::QAR2(B),XS(b)
      • P(e);N_GUARD::S(D),XP(c)
      • P(g);N_GUARD::S(E)
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