MESON Chess Problem Database

Problem Display
PID: 94839 (4K3/3pN2N/R2PkP2/1p2b3/8/1np3p1/4Q2n/3r1r2 w - - 0 1)

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

Magasinet, 1935

4K3/3pN2N/R2PkP2/1p2b3/8/1np3p1/4Q2n/3r1r2

#2

7 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf6
      • 2.Sg5#
  • Tries
    • 1.Qc4+?
      • 1...Rd5
        • 2.Qxd5#
      • 1...bxc4!
    • 1.Qg4+?
      • 1...Rf5
        • 2.Qxf5#
        • 2.Qg8#
      • 1...Sxg4!
    • 1.Qxb5?
      • threat
        • 2.Qxd7#
      • 1...Bxd6
        • 2.Qe2#
      • 1...Bxf6
        • 2.Sf8#
      • 1...Bd4
        • 2.Qd5#
      • 1...Bf4
        • 2.Qf5#
      • 1...Sc5!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qf7#
      • 1...Rxf6
        • 2.Sg5#
      • 1...Bxd6
        • 2.Qe2#
      • 1...Bxf6
        • 2.Sf8#
      • 1...Bd4
        • 2.Qd5#
      • 1...Bf4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK,XP(D)::S(F)
  • Tries
    • Try
      • Q(A);CHECK,N_PINB(h)
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
      • Refutation
        • P(g);XQ(A)
    • Try
      • Q(A);CHECK,N_PINB(h)
      • Refutation
        • S(c);XQ(A)
    • Try
      • Q(A);N_PINB(h),XP(g)
      • Threat
        • QAB1(A),XP(j)
      • Vars
        • B(h);OGATEB,P_SPINB(h),XP(C)::QAR(A)
        • B(h);SBLOCK,XP(D)::S(F)
        • B(h);S_CUTR(a)::QAB1(A)
        • B(h);OGATE::QAB1(A)
      • Refutation
        • S(d);
  • Actual
    • Q(A);N_PINB(h)
    • Threat
      • QAB1(A)
    • Vars
      • R(b);SBLOCK,XP(D)::S(F)
      • B(h);OGATEB,P_SPINB(h),XP(C)::QAR(A)
      • B(h);SBLOCK,XP(D)::S(F)
      • B(h);OGATE::QAB1(A)
      • B(h);S_CUTR(b)::QAB1(A)
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