MESON Chess Problem Database

Problem Display
PID: 133971 (8/5p2/p4R2/Rr2k3/3n2BB/p1N4p/K2Q1Pnr/7b w - - 0 1)

Kovacevic, Marjan

1st Prize, Mat Plus, 2008

8/5p2/p4R2/Rr2k3/3n2BB/p1N4p/K2Q1Pnr/7b

#2

8 + 10

23 Die Schwalbe 2012
56 The Problemist 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Rxc5#
    • 1...Rd5
      • 2.Rxd5#
    • 1...Se1
      • 2.Qf4#
      • 2.f4#
    • 1...Se3
      • 2.f4#
    • 1...Sf4
      • 2.Qxf4#
    • 1...Sxh4
      • 2.Qf4#
    • 1...Sc2
      • 2.Qd6#
    • 1...Se2
      • 2.Qd6#
    • 1...Sb3
      • 2.Qd6#
    • 1...Sf3
      • 2.Qd6#
    • 1...Sc6
      • 2.Qd6#
    • 1...Se6
      • 2.Rf5#
  • Tries
    • 1.Bg3+?
      • 1...Sf4
        • 2.Qxf4#
      • 1...Kxf6!
    • 1.Rxb5+?
      • 1...Sxb5
        • 2.Qd5#
      • 1...axb5!
    • 1.Rb6?
      • threat
        • 2.Bf6#
      • 1...Sxh4
        • 2.f4#
      • 1...Se3
        • 2.Bg3#
      • 1...Se6
        • 2.Qd6#
      • 1...f6
        • 2.Bxf6#
      • 1...Sc6!
    • 1.Rc6?
      • threat
        • 2.Bf6#
      • 1...Sxh4
        • 2.f4#
      • 1...Se3
        • 2.Bg3#
      • 1...Se6
        • 2.Qd6#
      • 1...f6
        • 2.Bxf6#
      • 1...Sxc6!
    • 1.Qe2+?
      • 1...Se3
        • 2.f4#
      • 1...Sxe2!
  • Keys
    • 1.Rfxa6!
      • threat
        • 2.Bf6#
      • 1...Sxh4
        • 2.f4#
      • 1...Se3
        • 2.Bg3#
      • 1...Sc6
        • 2.Rxb5#
      • 1...Se6
        • 2.Qd6#
      • 1...f6
        • 2.Bxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(g);OGATE::R(G),XR(g)
    • R(g);OGATE::R1(G),XR(g)
    • S(b);N_GUARD::P(C)
    • S(b);N_GUARD::QAB1(B),XS(b)
    • S(b);N_GUARD,XB(F)::QAB1(B)
    • S(f);OGATE::QAB1(B)
    • S(f);N_GUARD,SBLOCK::R1(H)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(B),XS(b)
      • Refutation
        • K(h);N_SPINR(g),S_FLIGHT,XR(H)
    • Try
      • R(G);CHECK,XR(g)
      • Vars
        • S(f);OGATE,XR(G)::QAR1(B)
      • Refutation
        • P(i);XR(G)
    • Try
      • R(H);
      • Threat
        • B(F)
      • Vars
        • S(b);N_GUARD,XB(F)::P(C)
        • S(b);N_GUARD::B(F)
        • S(f);OGATE::QAB1(B)
        • P(j);::B(F),XP(j)
      • Refutation
        • S(f);
    • Try
      • R(H);
      • Threat
        • B(F)
      • Vars
        • S(b);N_GUARD,XB(F)::P(C)
        • S(b);N_GUARD::B(F)
        • S(f);OGATE::QAB1(B)
        • P(j);::B(F),XP(j)
      • Refutation
        • S(f);XR(H)
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);P_SPINS(b)::P(C)
      • Refutation
        • S(f);XQ(B)
  • Actual
    • R(H);XP(i)
    • Threat
      • B(F)
    • Vars
      • S(b);N_GUARD,XB(F)::P(C)
      • S(b);N_GUARD::B(F)
      • S(f);N_GUARD::R(G),XR(g)
      • S(f);OGATE::QAB1(B)
      • P(j);::B(F),XP(j)
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