MESON Chess Problem Database

Problem Display
PID: 229103 (8/1p6/1Q2Pb2/3k1r2/1P2rpN1/1PR1p3/N4PB1/K7 w - - 0 1)

Grigoriev, K

64 Shakhmatnoe obozrenie, 1926

8/1p6/1Q2Pb2/3k1r2/1P2rpN1/1PR1p3/N4PB1/K7

#2

10 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sxf6#
      • 2.Rd3#
    • 1...Bxc3+
      • 2.Sxc3#
    • 1...Bh4
      • 2.Rd3#
    • 1...Bg5
      • 2.Rd3#
    • 1...Be7
      • 2.Rd3#
    • 1...Bd8
      • 2.Rd3#
  • Tries
    • 1.Qb5+?
      • 1...Kd4
        • 2.Rd3#
        • 2.Qd3#
        • 2.Qc4#
      • 1...Kd6
        • 2.Qd7#
      • 1...Kxe6!
    • 1.Qc6+?
      • 1...Kd4
        • 2.Qxe4#
        • 2.Qc4#
      • 1...bxc6!
    • 1.Qxb7+?
      • 1...Kd4
        • 2.Qxe4#
      • 1...Kd6
        • 2.Qd7#
      • 1...Kxe6!
    • 1.b5?
      • threat
        • 2.Sb4#
      • 1...Bxc3+
        • 2.Sxc3#
      • 1...Be7
        • 2.Rd3#
      • 1...f3!
  • Keys
    • 1.f3!
      • threat
        • 2.fxe4#
      • 1...Bxc3+
        • 2.Sxc3#
      • 1...Rxb4
        • 2.Sxb4#
      • 1...Rxe6
        • 2.Qc5#
      • 1...Rc4
        • 2.bxc4#
      • 1...Rd4
        • 2.Rc5#
      • 1...Ree5
        • 2.Rd3#
      • 1...Rfe5
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • B(f);CHECK,XR(F)::S(B),XB(f)
    • B(f);N_PINR(F)::R(F)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • K(d);N_SPINR(b),P-FLIGHT::QAR1(I)
      • Refutation
        • K(d);N_SPINR(b),S_FLIGHT,XP(J)
    • Try
      • Q(I);CHECK
      • Refutation
        • P(g);XQ(I)
    • Try
      • Q(I);CHECK,XP(g)
      • Vars
        • K(d);N_PINR(F),N_SPINR(b),OGATE,P-FLIGHT::QAR1(I),XR(b)
        • K(d);N_SPINR(b),P-FLIGHT::QAR1(I)
      • Refutation
        • K(d);N_SPINR(b),S_FLIGHT,XP(J)
    • Try
      • P(G);
      • Threat
        • S(B)
      • Vars
        • B(f);CHECK,XR(F)::S(B),XB(f)
        • B(f);N_PINR(F)::R(F)
      • Refutation
        • P(c);N_SPINR(b)
  • Actual
    • P(C);N_PINR(b)
    • Threat
      • P(C),XR(b)
    • Vars
      • B(f);CHECK,XR(F)::S(B),XB(f)
      • R(b);XP(G)::S(B),XR(b)
      • R(b);SBLOCK,XP(J)::QAR1(I)
      • R(b);OGATE::P(E),XR(b)
      • R(b);N_PINR(F),SBLOCK::R1(F)
      • R(b);N_PINR(F)::R(F)
      • R(e);N_GUARD,N_PINR(F),SBLOCK::S(H),XB(f)
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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).