MESON Chess Problem Database

Problem Display
PID: 251090 (2Q2r2/8/K1B5/PRN5/PN5p/1Pk1B1P1/P4R1q/2r4b w - - 0 1)

Pilchenko, Viacheslav Karlovich

Shavirin, Valery Mikhailovich

Sp. Prize, Uralski Problemist, 2011

2Q2r2/8/K1B5/PRN5/PN5p/1Pk1B1P1/P4R1q/2r4b

#2

13 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Sd5#
      • 2.Se4#
    • 1...Rh8
      • 2.Qxh8#
    • 1...Be4
      • 2.Sxe4#
    • 1...Bd5
      • 2.Sxd5#
    • 1...Bxc6
      • 2.Se4#
  • Tries
    • 1.Scd3?
      • threat
        • 2.Rc5#
      • 1...Rf4
        • 2.Be4#
      • 1...Rf5
        • 2.Bd5#
      • 1...Bd5!
    • 1.Bd2+?
      • 1...Kd4
        • 2.Se6#
      • 1...Kb2!
  • Keys
    • 1.Bg2!
      • threat
        • 2.Sd5#
        • 2.Se4#
      • 1...Rf6+
        • 2.Se6#
      • 1...Qxg2
        • 2.Se4#
      • 1...Rxf2
        • 2.Scd3#
      • 1...Bxg2
        • 2.Se4#
      • 1...Rc2
        • 2.Rxc2#
      • 1...Rd1
        • 2.Se4#
        • 2.Rc2#
      • 1...Rf5
        • 2.Se4#
      • 1...Rd8
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • R(f);OGATE::QAB(M),XR(f)
    • B(b);N_GUARD::S(J),XB(b)
    • B(b);N_GUARD::S(G),XB(b)
    • B(b);N_GUARD,XB(L)::S(J)
  • Tries
    • Try
      • S(J);
      • Threat
        • R(I)
      • Vars
        • R(f);N_GUARD::QAR(M)+B(L)
      • Refutation
        • B(b);
    • Try
      • B(D);CHECK
      • Vars
        • K(d);N_GUARD,S_FLIGHT::S(J)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • B(L);
    • Threat
      • DUALS(2)
    • Vars
      • R(f);CHECK,N_GUARD::QAR(M)+S(J)
      • Q(c);XB(L)::QAR(M)+S(J),DCHECK
      • R(f);N_GUARD,XR(B)::QAR(M)+S(J)
      • B(b);XB(L)::QAR(M)+S(J),DCHECK
      • R(a);N_GUARD::R1(B),XR(a)
      • R(f);::QAR(M)+S(J),DCHECK
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