MESON Chess Problem Database

Problem Display
PID: 90121 (B7/1r4P1/8/2B2p2/5K2/4R2p/2Q2Pkp/5n1r w - - 0 1)

Subotic, Miroslav

Die Schwalbe, 2000

B7/1r4P1/8/2B2p2/5K2/4R2p/2Q2Pkp/5n1r

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Bxb7#
  • Tries
    • 1.Qd1?
      • 1...Kg1
        • 2.Rg3#
      • 1...Kxf2
        • 2.Re2#
      • 1...Rg1
        • 2.Qf3#
      • 1...Sd2
        • 2.Rg3#
      • 1...Sg3
        • 2.Rxg3#
      • 1...Sxe3!
    • 1.f3+?
      • 1...Kg1
        • 2.Re1#
      • 1...Sd2!
  • Keys
    • 1.Re1!
      • 1...Kg1
        • 2.f3#
      • 1...Rg1
        • 2.Bxb7#
      • 1...Sd2
        • 2.g8Q#
        • 2.g8R#
      • 1...Se3
        • 2.fxe3#
      • 1...Sg3
        • 2.fxg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::B(G),XR(g)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(c);N_SPINR(g),P-FLIGHT,P_SPINS(a)::R(C)
        • K(c);N_SPINR(g),OGATEB,P-FLIGHT,XP(B)::B(E)+R(C),DCHECK
        • R(b);SBLOCK::QAB1(A)
        • S(a);N_GUARD::R1(C)
        • S(a);N_GUARD::R1(C),XS(a)
      • Refutation
        • S(a);XR(C)
    • Try
      • P(B);CHECK,N_PINR(g)
      • Vars
        • K(c);P-FLIGHT::B(E)+R(C)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • R(C);
    • Vars
      • K(c);N_SPINR(g),P-FLIGHT,P_SPINS(a)::B(E)+P(B)
      • R(b);SBLOCK::B(G),XR(g)
      • S(a);N_GUARD::P=Q
      • S(a);OGATE::QAR(A)+P(B),XS(a)
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