MESON Chess Problem Database

Problem Display
PID: 119777 (1Qr1R2n/2P5/q2k1N2/1Pp5/1r5p/4nN1K/8/8 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Bohemia, 1908

1Qr1R2n/2P5/q2k1N2/1Pp5/1r5p/4nN1K/8/8

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Qb6#
    • 1...Qa2
      • 2.Qb6#
    • 1...Qa3
      • 2.Qb6#
    • 1...Qa4
      • 2.Qb6#
    • 1...Qb6
      • 2.Qxb6#
    • 1...Rxb8
      • 2.cxb8Q#
      • 2.cxb8B#
    • 1...Rd8
      • 2.Qxd8#
      • 2.cxd8Q#
      • 2.cxd8S#
      • 2.cxd8B#
      • 2.cxd8R#
      • 2.c8Q#
      • 2.c8S#
      • 2.c8B#
      • 2.c8R#
  • Keys
    • 1.Sg5!
      • threat
        • 2.Re6#
      • 1...Rxb8
        • 2.cxb8Q#
        • 2.cxb8B#
      • 1...Rxe8
        • 2.c8S#
      • 1...c4
        • 2.Sge4#
      • 1...Qa2
        • 2.Qb6#
      • 1...Re4
        • 2.Sgxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(e);N_GUARD::QAR2(F)
    • Q(e);N_GUARD::QAR2(F),XQ(e)
    • R(g);OGATE,XQ(F)::PXR(g)=Q
  • Actual
    • S(A);
    • Threat
      • R1(G)
    • Vars
      • R(g);OGATE,XQ(F)::PXR(g)=Q
      • R(g);OGATE,XR(G)::P=S
      • P(d);S_CUTR(b)::S(A)
      • Q(e);N_GUARD::QAR2(F)
      • R(b);N_GUARD::S(A),XR(b)
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