MESON Chess Problem Database

Problem Display
PID: 105430 (8/8/7K/1p1npN2/6Rp/1BpkpQp1/2Nb2n1/3R4 w - - 0 1)

Erokhin, Vladimir Alekseevich

Revista Romana de Sah, 1983

8/8/7K/1p1npN2/6Rp/1BpkpQp1/2Nb2n1/3R4

#2

7 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Sxe1#
    • 1...Sgf4
      • 2.Se1#
    • 1...Sb4
      • 2.Sxb4#
    • 1...Sdf4
      • 2.Sb4#
    • 1...Sb6
      • 2.Sb4#
    • 1...Sf6
      • 2.Sb4#
    • 1...Sc7
      • 2.Sb4#
    • 1...Se7
      • 2.Sb4#
  • Tries
    • 1.Sxg3?
      • threat
        • 2.Qe2#
        • 2.Qe4#
        • 2.Qxd5#
      • 1...Sgf4
        • 2.Qe4#
      • 1...Sb4
        • 2.Sxb4#
        • 2.Qe2#
        • 2.Qe4#
      • 1...Sdf4
        • 2.Qe4#
      • 1...Sb6
        • 2.Sb4#
        • 2.Qe2#
        • 2.Qe4#
      • 1...Sf6
        • 2.Sb4#
        • 2.Qe2#
      • 1...Sc7
        • 2.Sb4#
        • 2.Qe2#
        • 2.Qe4#
      • 1...Se7
        • 2.Sb4#
        • 2.Qe2#
        • 2.Qe4#
      • 1...e4
        • 2.Qe2#
        • 2.Qxe4#
      • 1...hxg3!
    • 1.Bxd5?
      • threat
        • 2.Sb4#
      • 1...b4
        • 2.Sxb4#
      • 1...Kxc2!
  • Keys
    • 1.Sfxe3!
      • threat
        • 2.Qf1#
      • 1...Sgxe3
        • 2.Se1#
      • 1...Sdxe3
        • 2.Sb4#
      • 1...Sgf4
        • 2.Sxd5#
      • 1...Sdf4
        • 2.Sxg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • S(b);N_GUARD::S(B),XS(b)
    • S(b);N_GUARD::S(B)
    • S(i);N_GUARD::S(B),XS(i)
    • S(i);N_GUARD::S(B)
  • Tries
    • Try
      • S(F);XP(f)
      • Threat
        • DUALS(3)
      • Vars
        • S(b);::QAB1(D)
        • S(i);::QAB1(D)
      • Refutation
        • P(g);XS(F)
    • Try
      • B(C);XS(i)
      • Threat
        • S(B)
      • Vars
        • P(h);::S(B),XP(h)
      • Refutation
        • K(d);N_SPINB(a),N_SPINP(e),S_FLIGHT,XS(B)
  • Actual
    • S(F);P_SPINS(F),XP(e)
    • Threat
      • QAB(D)
    • Vars
      • S(b);N_GUARD,P_SPINS(b),XS(F)::S(B)
      • S(i);N_GUARD,P_SPINS(i),XS(F)::S(B)
      • S(b);N_PINS(F)::QAR(D)+S(F),XS(i)
      • S(i);N_PINS(F)::QAR(D)+S(F),XS(b)
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