MESON Chess Problem Database

Problem Display
PID: 179135 (2K1R2B/p1NPN3/8/r2p1BP1/3P1k1P/4rn1P/2bP1Q2/2q5 w - - 0 1)

Agostini, Valerio

Mariani, Stefano

3rd Prize, Problem Observer, 2009

2K1R2B/p1NPN3/8/r2p1BP1/3P1k1P/4rn1P/2bP1Q2/2q5

#2

13 + 8

136 Problem Observer 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.dxe3#
    • 1...Qa1
      • 2.dxe3#
    • 1...Qb1
      • 2.dxe3#
    • 1...Qd1
      • 2.dxe3#
    • 1...Qf1
      • 2.dxe3#
    • 1...Qg1
      • 2.dxe3#
    • 1...Qh1
      • 2.dxe3#
    • 1...Rea3
      • 2.Se6#
      • 2.Be5#
    • 1...Rb3
      • 2.Se6#
      • 2.Be5#
    • 1...Rc3
      • 2.Be5#
    • 1...Rd3
      • 2.Se6#
      • 2.Be5#
    • 1...Re5
      • 2.Bxe5#
    • 1...Re6
      • 2.Sxe6#
    • 1...Ra1
      • 2.Scxd5#
    • 1...Ra2
      • 2.Scxd5#
    • 1...Raa3
      • 2.Scxd5#
    • 1...Ra4
      • 2.Scxd5#
    • 1...Ra6
      • 2.Scxd5#
    • 1...Be4
      • 2.Be5#
  • Tries
    • 1.Qxf3+?
      • 1...Rxf3
        • 2.Be5#
      • 1...Kxf3!
  • Keys
    • 1.Be4!
      • threat
        • 2.Sg6#
      • 1...Kxe4
        • 2.Qxe3#
      • 1...Rxe4
        • 2.Rf8#
      • 1...Bxe4
        • 2.Be5#
      • 1...dxe4
        • 2.Se6#
      • 1...Ra6
        • 2.Sexd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 14
  • Sets
    • Q(a);N_GUARD::P(A),XR(c)
    • R(c);N_GUARD,P_PINS(H)::B(M)
    • R(c);N_GUARD::B(M),XR(c)
    • R(c);N_GUARD::S(H),XR(c)
    • R(f);N_GUARD::S(H),XP(g)
    • B(b);P_PINS(H),S_CUTR(c)::B(M)
  • Tries
    • Try
      • Q(B);CHECK,XS(d)
      • Vars
        • R(c);SBLOCK,XQ(B)::B(M)
      • Refutation
        • K(e);P-FLIGHT,XQ(B)
  • Actual
    • B(F);
    • Threat
      • S(J)
    • Vars
      • K(e);N_SPINS(d),P-FLIGHT,XB(F)::QAR1(B),XR(c)
      • R(c);SBLOCK,XB(F)::R(L)
      • B(b);P_PINS(H),SBLOCK,XB(F)::B(M)
      • P(g);SBLOCK,XB(F)::S(H)
      • R(f);N_GUARD::S(J),XP(g)
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