MESON Chess Problem Database

Problem Display
PID: 229048 (2N5/1pb1Q2K/4pR2/4k3/1N2p2P/2pb2r1/7B/3R3B w - - 0 1)

Kobets, Vasily Dimitrevich

2nd Comm., 64 Shakhmatnoe obozrenie, 1926

2N5/1pb1Q2K/4pR2/4k3/1N2p2P/2pb2r1/7B/3R3B

#2

9 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Bxg3#
      • 2.Rd5#
      • 2.Qxe6#
    • 1...Bf1
      • 2.Bxg3#
      • 2.Rd5#
      • 2.Qxe6#
    • 1...Bc2
      • 2.Bxg3#
      • 2.Rd5#
      • 2.Qxe6#
    • 1...Be2
      • 2.Bxg3#
      • 2.Rd5#
      • 2.Qxe6#
    • 1...Bc4
      • 2.Bxg3#
    • 1...Bb5
      • 2.Bxg3#
      • 2.Rd5#
      • 2.Qxe6#
    • 1...Ba6
      • 2.Bxg3#
      • 2.Rd5#
      • 2.Qxe6#
  • Tries
    • 1.Sxd3+?
      • 1...Kd4
        • 2.Qc5#
      • 1...Kd5
        • 2.Qc5#
      • 1...exd3!
    • 1.Rf5+?
      • 1...Kd4
        • 2.Qc5#
      • 1...Kxf5!
    • 1.Rxe6+?
      • 1...Kd4
        • 2.Rxe4#
      • 1...Kf4
        • 2.Qg5#
      • 1...Kf5!
    • 1.Qxc7+?
      • 1...Kxf6
        • 2.Qf4#
      • 1...Kd4!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Qf6#
      • 1...Rg7+
        • 2.Qxg7#
      • 1...e3+
        • 2.Sxd3#
      • 1...Kd4
        • 2.Rxe4#
      • 1...Kxf4
        • 2.Qg5#
      • 1...Rg6
        • 2.Qc5#
      • 1...Bd8
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • B(b);::B(C),XR(c)
  • Tries
    • Try
      • S(D);CHECK,XB(b)
      • Vars
        • K(e);N_SPINP(f),N_SPINR(c),S_FLIGHT::QAB1(G)
        • K(e);N_SPINP(f),N_SPINR(c),P-FLIGHT,P_SPINP(d)::QAR1(G)
      • Refutation
        • P(d);XS(D)
    • Try
      • R(F);CHECK
      • Vars
        • K(e);N_SPINP(f),N_SPINR(c),P_SPINB(b),S_FLIGHT::QAB1(G)
      • Refutation
        • K(e);N_SPINP(f),N_SPINR(c),P-FLIGHT,XR(F)
    • Try
      • R(F);CHECK,XP(f)
      • Vars
        • K(e);N_SPINR(c),OGATE,P_SPINB(b),S_FLIGHT::R1(F),XP(d)
        • K(e);S_FLIGHT::QAB1(G)
      • Refutation
        • K(e);N_SPINR(c),P-FLIGHT
    • Try
      • Q(G);CHECK,N_PINP(f),XB(h)
      • Vars
        • K(e);N_SPINR(c),OGATE,S_FLIGHT,XR(F)::QAR2(G)
      • Refutation
        • K(e);N_SPINR(c),P_SPINB(b),S_FLIGHT
  • Actual
    • R(F);N_PINR(c)
    • Threat
      • QAB1(G)
    • Vars
      • R(c);CHECK,N_GUARD::QAB(G),XR(c)
      • P(d);CHECK,N_GUARD,S_CUTR(c)::S(D),XB(b)
      • K(e);N_SPINP(f),P_SPINB(b),P_SPINP(d),S_FLIGHT::R1(F),XP(d)
      • K(e);N_SPINP(f),P_SPINR(c),S_FLIGHT,XR(F)::QAB1(G)
      • R(c);::QAR2(G)
      • B(h);N_GUARD::QAB1(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).