MESON Chess Problem Database

Problem Display
PID: 183137 (8/2p3Q1/K2b2Rp/2k4P/1p3p2/3P1B2/4Pp2/5b2 w - - 0 1)

Grunfeld, W

Deutsches Wochenschach, 1907

8/2p3Q1/K2b2Rp/2k4P/1p3p2/3P1B2/4Pp2/5b2

#2

7 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Qxe5#
    • 1...Be7
      • 2.Rc6#
      • 2.Qe5#
    • 1...Bf8
      • 2.Rc6#
      • 2.Qe5#
    • 1...b3
      • 2.Qc3#
    • 1...c6
      • 2.Qa7#
  • Tries
    • 1.Rg5+?
      • 1...Be5
        • 2.Qxe5#
      • 1...hxg5!
    • 1.Rxd6?
      • threat
        • 2.Rc6#
        • 2.Qd4#
        • 2.Qe5#
        • 2.Qxc7#
      • 1...cxd6
        • 2.Qa7#
      • 1...b3
        • 2.Qd4#
      • 1...c6
        • 2.Rxc6#
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kxd6!
    • 1.Qf7?
      • threat
        • 2.Qc4#
        • 2.Qd5#
      • 1...b3
        • 2.Qc4#
      • 1...c6
        • 2.Qc4#
        • 2.Qa7#
      • 1...Kd4!
    • 1.Qg8?
      • threat
        • 2.Qc4#
        • 2.Qd5#
      • 1...b3
        • 2.Qc4#
      • 1...c6
        • 2.Qc4#
      • 1...Kd4!
  • Keys
    • 1.Rg1!
      • 1...Bxe2
        • 2.Rc1#
      • 1...fxg1Q
        • 2.Qxg1#
      • 1...fxg1S
        • 2.Qxg1#
      • 1...fxg1B
        • 2.Qxg1#
      • 1...fxg1R
        • 2.Qxg1#
      • 1...Be5
        • 2.Qxe5#
      • 1...Be7
        • 2.Qe5#
      • 1...Bf8
        • 2.Qe5#
      • 1...b3
        • 2.Qc3#
      • 1...Bg2
        • 2.Rc1#
      • 1...Bh3
        • 2.Rc1#
      • 1...c6
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • B(f);N_GUARD::QAR2(G),XB(f)
    • P(c);N_GUARD::QAR2(G)
    • P(h);OGATE::QAB(G)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR2(G),XB(f)
      • Refutation
        • P(g);XR(F)
    • Try
      • R(F);XB(f)
      • Threat
        • DUALS(4)
      • Vars
        • P(h);OGATE,SBLOCK,XR(F)::QAB(G)
        • P(c);::QAB1(G)
      • Refutation
        • K(e);S_FLIGHT,XR(F)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAR1(G)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAR1(G)
        • P(h);::QAR1(G)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • R(F);
    • Vars
      • B(a);OGATE,P_PINP(B),XP(A)::R(F)
      • P(b);OGATE,XR(F)::QAB(G),XQ(b)
      • P(b);OGATE,XR(F)::QAB(G),XS(b)
      • P(b);OGATE,XR(F)::QAB(G),XB(b)
      • P(b);OGATE,XR(F)::QAB(G),XR(b)
      • B(f);N_GUARD::QAR2(G),XB(f)
      • B(f);N_GUARD::QAR2(G)
      • P(c);N_GUARD::QAR2(G)
      • B(a);OGATE::R(F)
      • P(h);OGATE::QAB(G)
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).