MESON Chess Problem Database

Problem Display
PID: 143534 (4Q3/3K4/B1N1p3/Rn1p4/1N1pkPP1/3p4/2RPp1Pb/5r2 w - - 0 1)

Robert, Philippe

4th Comm., Die Schwalbe, 2011

4Q3/3K4/B1N1p3/Rn1p4/1N1pkPP1/3p4/2RPp1Pb/5r2

#2

11 + 9

23 Die Schwalbe 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf4
      • 2.Qxe6#
    • 1...Bxf4
      • 2.Qg6#
    • 1...e5
      • 2.Qxe5#
  • Tries
    • 1.Sxd5?
      • threat
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Qxe6#
      • 1...Bxf4
        • 2.Sf6#
      • 1...Sc7
        • 2.Qg6#
      • 1...e5
        • 2.Qxe5#
      • 1...dxc2!
    • 1.Qh5?
      • threat
        • 2.Qe5#
      • 1...Bxf4
        • 2.Qg6#
        • 2.Qh7#
      • 1...e5
        • 2.Qxe5#
        • 2.Qf5#
      • 1...Kxf4!
    • 1.Qh8?
      • threat
        • 2.Qe5#
      • 1...Bxf4
        • 2.Qh7#
      • 1...e5
        • 2.Qxe5#
      • 1...Kxf4!
  • Keys
    • 1.Sxd3!
      • threat
        • 2.Qg6#
      • 1...Kxd3
        • 2.Qg6#
      • 1...Rxf4
        • 2.Sc5#
      • 1...Sd6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(a);SBLOCK,XP(E)::QAR2(K),XP(i)
    • B(c);SBLOCK,XP(E)::QAB(K)
    • P(i);OGATE::QAR1(K),XP(i)
  • Tries
    • Try
      • S(D);XP(h)
      • Threat
        • QAR2(K),XP(i)
      • Vars
        • K(f);N_SPINP(i),P_SPINS(g),S_FLIGHT,XS(D)::QAB1(K),XP(i)
        • B(c);SBLOCK,XP(E)::S(D)
        • S(g);::QAB(K)
        • P(i);OGATE::QAR1(K),XP(i)
      • Refutation
        • P(d);XR(A)
    • Try
      • Q(K);N_PINP(i)
      • Threat
        • QAR1(K)
      • Refutation
        • K(f);P-FLIGHT,XP(E)
    • Try
      • Q(K);N_PINP(i)
      • Threat
        • QAR1(K)
      • Vars
        • B(c);SBLOCK,XP(E)::QAB(K)
        • P(i);::QAR1(K),XP(i)
      • Refutation
        • K(f);P-FLIGHT,XP(E)
  • Actual
    • S(D);XP(d)
    • Threat
      • QAB(K)
    • Vars
      • K(f);N_SPINP(i),P_SPINS(g),S_FLIGHT,XS(D)::QAB(K)
      • R(a);SBLOCK,XP(E)::S(D)
      • S(g);::QAR2(K),XP(i)
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