MESON Chess Problem Database

Problem Display
PID: 265465 (r5B1/1N5Q/n1p1n1r1/3p1Np1/P1k5/R5K1/1P1B4/5b2 w - - 0 1)

Coello Alonso, Jose Antonio

Schweizerische Schachzeitung, 2015

r5B1/1N5Q/n1p1n1r1/3p1Np1/P1k5/R5K1/1P1B4/5b2

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.b3#
    • 1...Sb4
      • 2.Rc3#
    • 1...Sac5
      • 2.Sbd6#
    • 1...Sd4
      • 2.Se3#
    • 1...Sec5
      • 2.Sa5#
    • 1...c5
      • 2.Sa5#
      • 2.Sbd6#
  • Tries
    • 1.Qe7?
      • threat
        • 2.Sa5#
        • 2.Rc3#
      • 1...Sb4
        • 2.Rc3#
        • 2.Qxb4#
      • 1...Sac5
        • 2.Sbd6#
      • 1...Sac7
        • 2.Rc3#
        • 2.Qb4#
      • 1...Sb8
        • 2.Rc3#
        • 2.Qb4#
      • 1...Sec5
        • 2.Sa5#
      • 1...c5
        • 2.Sa5#
        • 2.Sbd6#
      • 1...d4!
    • 1.b4?
      • threat
        • 2.Sa5#
        • 2.Sbd6#
      • 1...Sxb4
        • 2.Rc3#
      • 1...Rd8
        • 2.Sa5#
      • 1...Sac5
        • 2.Sbd6#
      • 1...Sac7
        • 2.Sbd6#
      • 1...Sb8
        • 2.Sbd6#
      • 1...Sd4
        • 2.Se3#
        • 2.Sa5#
      • 1...Sf4
        • 2.Sa5#
      • 1...Sec5
        • 2.Sa5#
      • 1...Sec7
        • 2.Sa5#
      • 1...Sg7
        • 2.Sa5#
      • 1...Sd8
        • 2.Sa5#
      • 1...Sf8
        • 2.Sa5#
      • 1...d4!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qxf1#
      • 1...Be2
        • 2.Qc1#
      • 1...Bg2
        • 2.Qc1#
      • 1...Bd3
        • 2.b3#
      • 1...Bh3
        • 2.Qc1#
      • 1...Sb4
        • 2.Rc3#
      • 1...Sac5
        • 2.Sbd6#
      • 1...Sd4
        • 2.Se3#
      • 1...Sf4
        • 2.Qe4#
      • 1...Sec5
        • 2.Sa5#
      • 1...d4
        • 2.Sfd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::P(A)
    • S(e);SBLOCK::R1(C)
    • S(e);SBLOCK::S(G)
    • S(g);P_SPINP(c),SBLOCK::S(F)
    • S(g);P_SPINP(c),SBLOCK::S(G)
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);SBLOCK::S(G)
        • S(g);P_SPINP(c)::S(G)
      • Refutation
        • P(c);P_SPINS(g)
    • Try
      • P(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);SBLOCK,XP(A)::R1(C)
        • R(i);::S(G)
        • S(e);::S(G)
        • S(g);P_SPINP(c)::S(G)
      • Refutation
        • P(c);P_SPINS(g)
  • Actual
    • Q(H);
    • Threat
      • QAB(H),XB(a)
    • Vars
      • B(a);OGATE::QAR(H)
      • B(a);SBLOCK::P(A)
      • S(e);SBLOCK::R1(C)
      • S(e);SBLOCK::S(G)
      • S(g);P_SPINP(c),SBLOCK::S(F)
      • S(g);N_GUARD,P_SPINP(c)::QAR2(H)
      • S(g);P_SPINP(c),SBLOCK::S(G)
      • P(c);P_SPINS(g),SBLOCK::S(F)
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