MESON Chess Problem Database

Problem Display
PID: 111164 (n7/8/1n1b4/2R1N2b/1p1kP3/1PN1p3/8/KB4Q1 w - - 0 1)

Shedey, Sergey Oleksandrovich

Shakhmaty v SSSR, 1970

n7/8/1n1b4/2R1N2b/1p1kP3/1PN1p3/8/KB4Q1

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Qxe3#
  • Tries
    • 1.Rd5+?
      • 1...Kxc3
        • 2.Rd3#
        • 2.Qxe3#
      • 1...Sxd5!
    • 1.Qc1?
      • threat
        • 2.Sb5#
      • 1...Kxc5
        • 2.Qxe3#
      • 1...Bxc5
        • 2.Sc6#
      • 1...bxc3
        • 2.Qxc3#
      • 1...Sd5
        • 2.Rxd5#
      • 1...Be2
        • 2.Sxe2#
      • 1...Be8
        • 2.Se2#
      • 1...Sc4
        • 2.Rd5#
      • 1...Sc7!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Sc6#
      • 1...Kxc5
        • 2.Qxe3#
      • 1...Bxc5
        • 2.Sb5#
      • 1...Bxe5
        • 2.Qxe5#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Be8
        • 2.Sf3#
      • 1...Sd5
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT,XR(G)::QAB(C),XP(a)
  • Tries
    • Try
      • R(G);CHECK
      • Refutation
        • S(e);XR(G)
    • Try
      • Q(C);N_PINP(a)
      • Threat
        • S(E)
      • Vars
        • K(c);S_FLIGHT,XR(G)::QAB(C),XP(a)
        • B(f);SBLOCK,XR(G)::S(H)
        • P(b);OGATE,XS(E)::QAB1(C),XP(b)
        • S(e);N_GUARD::R1(G),XS(e)
        • B(d);N_GUARD::S(E),XB(d)
        • B(d);N_GUARD::S(E)
        • S(e);N_GUARD::R1(G)
      • Refutation
        • S(g);
  • Actual
    • Q(C);N_PINP(a)
    • Threat
      • S(H)
    • Vars
      • K(c);S_FLIGHT,XR(G)::QAB(C),XP(a)
      • B(f);SBLOCK,XR(G)::S(E)
      • B(f);OGATE,XS(H)::QAB1(C),XB(f)
      • S(e);N_GUARD::R1(G),XS(e)
      • B(d);N_GUARD::S(H)
      • S(e);N_GUARD::R1(G)
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