MESON Chess Problem Database

Problem Display
PID: 251198 (7r/3p1Q2/5p1p/1r2pn2/1Np1k3/3bP3/4P3/B1KNnR2 w - - 0 1)

Guida, Marco

4th HM., Uralski Problemist-20 JT, 2013

7r/3p1Q2/5p1p/1r2pn2/1Np1k3/3bP3/4P3/B1KNnR2

#2

8 + 11

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qxd5#
    • 1...Rb6
      • 2.Qd5#
    • 1...Rb7
      • 2.Qd5#
    • 1...Rbb8
      • 2.Qd5#
    • 1...Sf3
      • 2.exf3#
  • Tries
    • 1.Kd2?
      • threat
        • 2.Sf2#
        • 2.Sc3#
      • 1...Sf3+
        • 2.exf3#
      • 1...c3+
        • 2.Sxc3#
      • 1...Bxe2
        • 2.Sc3#
      • 1...Sg3
        • 2.Sc3#
      • 1...Sd4
        • 2.Sc3#
      • 1...Sh4
        • 2.Sc3#
      • 1...Sd6
        • 2.Sc3#
      • 1...Se7
        • 2.Sc3#
      • 1...Sg7
        • 2.Sc3#
      • 1...Sxe3!
    • 1.Qg6?
      • threat
        • 2.Qxf5#
        • 2.Qg4#
      • 1...Bxe2
        • 2.Qxf5#
      • 1...Rg8
        • 2.Qxf5#
      • 1...Sg2
        • 2.Qxf5#
        • 2.Qxg2#
      • 1...Sf3
        • 2.Qg4#
        • 2.exf3#
      • 1...h5
        • 2.Qxf5#
      • 1...Rxb4!
    • 1.Qxf6?
      • threat
        • 2.Qxf5#
      • 1...Rxb4
        • 2.Qxe5#
      • 1...Sxe3
        • 2.Sf2#
      • 1...Sf3
        • 2.exf3#
      • 1...Sg3
        • 2.Qh4#
      • 1...Sd4
        • 2.Qh4#
      • 1...Sh4
        • 2.Qxh4#
      • 1...Sd6
        • 2.Qh4#
      • 1...Se7
        • 2.Qh4#
      • 1...Sg7
        • 2.Qh4#
      • 1...Rf8!
  • Keys
    • 1.Qxd7!
      • threat
        • 2.Qxf5#
      • 1...Rxb4
        • 2.Qc6#
      • 1...Sxe3
        • 2.Sc3#
      • 1...Sf3
        • 2.exf3#
      • 1...Sg3
        • 2.Qg4#
      • 1...Sd4
        • 2.Qg4#
      • 1...Sh4
        • 2.Qg4#
      • 1...Sd6
        • 2.Qg4#
      • 1...Se7
        • 2.Qg4#
      • 1...Sg7
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • R(e);N_GUARD::QAB1(H),XR(e)
    • R(e);N_GUARD::QAB1(H)
    • S(a);OGATE::P(E),XS(a)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,OGATE::P(E),XS(a)
        • P(c);CHECK::S(C),XP(c)
        • B(b);XP(E)::S(C)
        • S(g);::S(C)
      • Refutation
        • S(g);XP(F)
    • Try
      • Q(H);P_PINS(g)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);XP(E)::QAB1(H),XS(g)
        • R(k);::QAB1(H),XS(g)
        • P(i);::QAB1(H),XS(g)
      • Refutation
        • R(e);XS(G)
    • Try
      • Q(H);XP(h)
      • Threat
        • QAB1(H),XS(g)
      • Vars
        • R(e);N_GUARD,XS(G)::QAR1(H),XP(f)
        • S(g);SBLOCK,XP(F)::S(C)
        • S(a);OGATE::P(E),XS(a)
        • S(g);N_GUARD::QAR(H)
        • S(g);N_GUARD::QAR(H),XS(g)
      • Refutation
        • R(k);
  • Actual
    • Q(H);XP(j)
    • Threat
      • QAB1(H),XS(g)
    • Vars
      • R(e);N_GUARD,XS(G)::QAB(H)
      • S(g);SBLOCK,XP(F)::S(C)
      • S(a);OGATE::P(E),XS(a)
      • S(g);OGATE::QAR2(H)
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