MESON Chess Problem Database

Problem Display
PID: 109902 (2K3n1/2NQ1N2/3P3p/7p/1P1k4/3brP2/BPr3p1/3R2B1 w - - 0 1)

Fleuiss, Jorge Roxo

Caissa, 1981

2K3n1/2NQ1N2/3P3p/7p/1P1k4/3brP2/BPr3p1/3R2B1

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb2
      • 2.Sb5#
    • 1...Rd2
      • 2.Se6#
    • 1...Re2
      • 2.Sb5#
      • 2.Se6#
    • 1...Rf2
      • 2.Sb5#
    • 1...Rxc7+
      • 2.dxc7#
    • 1...Se7+
      • 2.dxe7#
    • 1...h4
      • 2.Qg4#
  • Tries
    • 1.Kb7?
      • threat
        • 2.Sb5#
        • 2.Se6#
      • 1...Rxc7+
        • 2.dxc7#
      • 1...Rxb2
        • 2.Sb5#
      • 1...Rd2
        • 2.Se6#
      • 1...Rf2
        • 2.Sb5#
      • 1...Rc5
        • 2.Se6#
      • 1...Rc4!
    • 1.Kb8?
      • threat
        • 2.Sb5#
        • 2.Se6#
      • 1...Rxb2
        • 2.Sb5#
      • 1...Rxc7
        • 2.dxc7#
      • 1...Rd2
        • 2.Se6#
      • 1...Rf2
        • 2.Sb5#
      • 1...Rc5
        • 2.Se6#
      • 1...Rc4!
    • 1.Kd8?
      • threat
        • 2.Sb5#
        • 2.Se6#
      • 1...Rxb2
        • 2.Sb5#
      • 1...Rxc7
        • 2.dxc7#
      • 1...Rd2
        • 2.Se6#
      • 1...Rf2
        • 2.Sb5#
      • 1...Rc5
        • 2.Se6#
      • 1...Rc4!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qh4#
      • 1...Rxc7+
        • 2.dxc7#
      • 1...Se7+
        • 2.dxe7#
      • 1...Rxb2
        • 2.Sb5#
      • 1...Rd2
        • 2.Se6#
      • 1...Rf2
        • 2.Sb5#
      • 1...Sf6
        • 2.Qxf6#
      • 1...h4
        • 2.Qxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);N_PINS(H),XP(D)::S(H)
    • R(a);N_PINS(H),N_SPINB(c)::S(H)
    • R(a);N_PINS(H),N_SPINR(d)::S(H)
    • R(a);CHECK,OGATE,XS(H)::QAR(I)+P(G),XR(a)
    • S(h);CHECK,OGATE::QAR(I)+P(G),XS(h)
    • P(f);N_GUARD::QAR(I)
  • Tries
    • Try
      • K(K);N_SPINS(H),S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,OGATE,XS(H)::QAR(I)+P(G),XR(a)
        • R(a);P_PINP(F),XP(D)::S(H)
        • R(a);N_SPINB(c)::S(H)
        • R(a);N_SPINR(d)::S(H)
        • R(a);::S(H)
      • Refutation
        • R(a);
    • Try
      • K(K);N_SPINS(H),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(a);P_PINP(F),XP(D)::S(H)
        • R(a);OGATE,XS(H)::QAR(I)+P(G),XR(a)
        • R(a);N_SPINB(c)::S(H)
        • R(a);N_SPINR(d)::S(H)
        • R(a);::S(H)
      • Refutation
        • R(a);
    • Try
      • K(K);N_SPINS(H),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XP(D)::S(H)
        • R(a);OGATE,XS(H)::QAR(I)+P(G),XR(a)
        • R(a);N_SPINB(c)::S(H)
        • R(a);N_SPINR(d)::S(H)
        • R(a);::S(H)
      • Refutation
        • R(a);
  • Actual
    • Q(I);
    • Threat
      • QAR(I)
    • Vars
      • R(a);CHECK,OGATE,XS(H)::QAR(I)+P(G),XR(a)
      • S(h);CHECK,OGATE::QAR(I)+P(G),XS(h)
      • R(a);N_PINS(H),XP(D)::S(H)
      • R(a);N_PINS(H),N_SPINB(c)::S(H)
      • R(a);N_PINS(H),N_SPINR(d)::S(H)
      • S(h);N_GUARD::QAB(I),XS(h)
      • P(f);::QAR(I),XP(f)
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