MESON Chess Problem Database

Problem Display
PID: 142597 (4r3/1R4p1/Ppkp1nK1/3r1Q2/PP6/3PnB2/2b5/2R5 w - - 0 1)

Ageev, Gennadi Mikhailovich

Phenix, 1990

4r3/1R4p1/Ppkp1nK1/3r1Q2/PP6/3PnB2/2b5/2R5

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qc8#
    • 1...Re5
      • 2.Qc8#
    • 1...Rc8
      • 2.Qxc8#
    • 1...Sf1
      • 2.Rxc2#
    • 1...Sg2
      • 2.Rxc2#
    • 1...Seg4
      • 2.Rxc2#
    • 1...Sxf5
      • 2.Rxc2#
    • 1...Se4
      • 2.Qd7#
    • 1...Sfg4
      • 2.Qd7#
    • 1...Sh5
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
    • 1...Sh7
      • 2.Qd7#
    • 1...Sg8
      • 2.Qd7#
    • 1...b5
      • 2.axb5#
  • Tries
    • 1.Bxd5+?
      • 1...Sfxd5
        • 2.Qd7#
      • 1...Sexd5!
    • 1.Rxc2+?
      • 1...Sc4
        • 2.Rxc4#
      • 1...Sxc2!
    • 1.Qxd5+?
      • 1...Sexd5
        • 2.Rxc2#
      • 1...Sfxd5!
  • Keys
    • 1.d4!
      • threat
        • 2.b5#
      • 1...Re4
        • 2.Qc8#
      • 1...Se4
        • 2.Qd7#
      • 1...b5
        • 2.axb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 11
  • Sets
    • R(i);N_GUARD,N_SPINR(c)::QAR2(F)
    • R(i);N_GUARD::QAR2(F)
    • R(i);N_GUARD::QAR2(F),XR(i)
    • S(b);N_GUARD::R(A),XB(a)
    • S(b);N_GUARD,XQ(F)::R(A),XB(a)
    • S(g);N_GUARD,N_SPINR(c)::QAB1(F)
    • S(g);N_GUARD::QAB1(F)
    • S(g);N_GUARD::QAB1(F),XS(g)
    • P(d);OGATE::P(D),XP(d)
  • Tries
    • Try
      • B(C);CHECK,XR(c)
      • Vars
        • S(g);SBLOCK,XB(C)::QAB1(F)
      • Refutation
        • S(b);XB(C)
    • Try
      • R(A);CHECK,XB(a)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::R(A),XS(b)
      • Refutation
        • S(b);XR(A)
    • Try
      • Q(F);CHECK,P_SPINP(B),XR(c)
      • Vars
        • S(b);P_SPINS(b),XQ(F)::R(A),XB(a)
      • Refutation
        • S(g);P_SPINS(g),XQ(F)
  • Actual
    • P(B);P_SPINQ(F)
    • Threat
      • P(E)
    • Vars
      • R(i);N_PINQ(F),N_SPINR(c)::QAR2(F)
      • S(g);N_PINQ(F),N_SPINR(c)::QAB1(F)
      • P(d);OGATE::P(D),XP(d)
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