MESON Chess Problem Database

Problem Display
PID: 71621 (7K/Bbp4p/1r2QN2/8/4Pr2/4PkPP/4R1R1/8 w - - 0 1)

Stojnic, Dragan

The Problemist, 2007

7K/Bbp4p/1r2QN2/8/4Pr2/4PkPP/4R1R1/8

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.Qxg4#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rxf6
      • 2.Qg4#
    • 1...Rb1
      • 2.Ref2#
    • 1...Rb3
      • 2.Ref2#
    • 1...Rb4
      • 2.Ref2#
    • 1...Rb5
      • 2.Ref2#
    • 1...Ra6
      • 2.Ref2#
    • 1...Rc6
      • 2.Ref2#
    • 1...Rd6
      • 2.Ref2#
    • 1...Rxe6
      • 2.Ref2#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Ref2#
      • 1...Rbxf6
        • 2.exf4#
      • 1...Rfxf6!
    • 1.Qf5?
      • threat
        • 2.Qxf4#
      • 1...Rxf6
        • 2.Ref2#
      • 1...Rxf5!
    • 1.Qg8?
      • threat
        • 2.Rgf2#
      • 1...Rfxf6
        • 2.Qg4#
      • 1...Rg4
        • 2.Qxg4#
      • 1...Rbxf6!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qxf4#
      • 1...Rxe4
        • 2.Rgf2#
      • 1...Rfxf6
        • 2.Rgf2#
      • 1...Rbxf6
        • 2.Ref2#
      • 1...Rg4
        • 2.Rgf2#
      • 1...Rh4
        • 2.Rgf2#
      • 1...Rf5
        • 2.Rgf2#
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(b);N_GUARD::QAB1(G),XR(b)
    • R(b);OGATEB::QAR2(G),XR(b)
    • R(b);N_GUARD,XS(H)::QAB1(G)
    • R(c);::R1(A)
    • R(c);XQ(G)::R1(A)
  • Tries
    • Try
      • Q(G);
      • Threat
        • R1(A)
      • Vars
        • R(c);N_GUARD,XS(H)::QAR(G)+P(C),XR(b)
      • Refutation
        • R(b);XS(H)
    • Try
      • Q(G);P_PINR(b)
      • Threat
        • QAR1(G),XR(b)
      • Vars
        • R(c);XS(H)::R1(A)
      • Refutation
        • R(b);N_SPINR(b),XQ(G)
    • Try
      • Q(G);
      • Threat
        • R1(B)
      • Vars
        • R(b);N_GUARD,XS(H)::QAB1(G)
        • R(b);N_GUARD::QAB1(G),XR(b)
      • Refutation
        • R(c);XS(H)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G),XR(b)
    • Vars
      • R(b);XP(F)::R1(B)
      • R(b);XS(H)::R1(B)
      • R(c);XS(H)::R1(A)
      • R(b);::R1(B)
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