MESON Chess Problem Database

Problem Display
PID: 231823 (1bNnK3/8/p2P4/rk1P3R/r1n4R/2p5/N1P1Q3/6BB w - - 0 1)

Gundry, WH

The Field, 1899

(First published on Sat Sep 2 1899)

1bNnK3/8/p2P4/rk1P3R/r1n4R/2p5/N1P1Q3/6BB

#2

11 + 8

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa2
      • 2.Qxc4#
    • 1...Ra3
      • 2.Qxc4#
    • 1...Rb4
      • 2.Sxc3#
    • 1...Bxd6
      • 2.Sxd6#
      • 2.Sa7#
    • 1...Ba7
      • 2.Sxa7#
    • 1...Bc7
      • 2.Sa7#
    • 1...Sc6
      • 2.dxc6#
    • 1...Se6
      • 2.dxe6#
  • Tries
    • 1.Kxd8?
      • threat
        • 2.Qe8#
      • 1...Rxa2
        • 2.Qxc4#
      • 1...Bc7+!
    • 1.Rxc4?
      • threat
        • 2.Sxc3#
        • 2.Rb4#
        • 2.Rc5#
      • 1...Rxa2
        • 2.Re4#
        • 2.Rf4#
        • 2.Rg4#
        • 2.Rch4#
      • 1...Rb4
        • 2.Sxc3#
        • 2.Rxb4#
      • 1...Ra3
        • 2.Rb4#
        • 2.Re4#
        • 2.Rf4#
        • 2.Rg4#
        • 2.Rch4#
      • 1...Rxc4!
    • 1.Rh7?
      • 1...Rxa2
        • 2.Qxc4#
      • 1...Bxd6
        • 2.Sxd6#
        • 2.Sa7#
      • 1...Ra3
        • 2.Qxc4#
      • 1...Rb4
        • 2.Sxc3#
      • 1...Sb7
        • 2.Rxb7#
      • 1...Ba7
        • 2.Sxa7#
      • 1...Bc7
        • 2.Sa7#
      • 1...Sc6
        • 2.Rb7#
      • 1...Se6
        • 2.Rb7#
      • 1...Sf7!
  • Keys
    • 1.Kf8!
      • 1...Bxd6+
        • 2.Sxd6#
      • 1...Se6+
        • 2.dxe6#
      • 1...Rxa2
        • 2.Qxc4#
      • 1...Ra3
        • 2.Qxc4#
      • 1...Rb4
        • 2.Sxc3#
      • 1...Sb7
        • 2.Qe8#
      • 1...Ba7
        • 2.Sxa7#
      • 1...Bc7
        • 2.Sa7#
      • 1...Sc6
        • 2.dxc6#
      • 1...Sf7
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD,XS(C)::QAB1(E),XS(c)
    • R(b);N_GUARD::QAB1(E),XS(c)
    • R(b);SBLOCK::S(C),XP(a)
    • B(g);N_GUARD::S(J),XB(g)
    • B(g);N_GUARD::S(J)
    • S(h);OGATE::R(H)+P(G),XS(h)
  • Tries
    • Try
      • K(K);P-FLIGHT,XS(h)
      • Threat
        • QAB(E)
      • Vars
        • R(b);N_GUARD,XS(C)::QAB1(E),XS(c)
      • Refutation
        • B(g);CHECK
    • Try
      • R(F);XS(c)
      • Threat
        • DUALS(3)
      • Refutation
        • R(b);P_SPINR(b),XR(F)
    • Try
      • R(H);
      • Vars
        • R(b);N_GUARD,XS(C)::QAB1(E),XS(c)
        • R(b);N_GUARD::QAB1(E),XS(c)
        • R(b);SBLOCK::S(C),XP(a)
        • S(h);N_GUARD::R(H),XS(h)
        • B(g);N_GUARD::S(J),XB(g)
        • B(g);N_GUARD::S(J)
        • S(h);N_GUARD::R(H)
      • Refutation
        • S(h);
  • Actual
    • K(K);P-FLIGHT
    • Vars
      • B(g);CHECK,XP(I)::S(J),XB(g)
      • S(h);CHECK,OGATE::R(H)+P(G),XS(h)
      • R(b);N_GUARD,XS(C)::QAB1(E),XS(c)
      • R(b);N_GUARD::QAB1(E),XS(c)
      • R(b);SBLOCK::S(C),XP(a)
      • S(h);N_GUARD::QAB(E)
      • B(g);N_GUARD::S(J),XB(g)
      • B(g);N_GUARD::S(J)
      • S(h);OGATE::R(H)+P(G),XS(h)
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