MESON Chess Problem Database

Problem Display
PID: 207708 (1B1NB2n/5b2/1Rq2P2/2RP1k2/8/3P4/6QP/7K w - - 0 1)

Lebedev, Alexey Nikolaevich

Il Problema, 1933

1B1NB2n/5b2/1Rq2P2/2RP1k2/8/3P4/6QP/7K

#2

11 + 4

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sxf7?
      • threat
        • 2.Qg5#
      • 1...Kxf6
        • 2.Qg5#
      • 1...Qxd5
        • 2.Sh6#
        • 2.Bd7#
        • 2.Rxd5#
        • 2.Qe4#
      • 1...Qxf6
        • 2.Qe4#
      • 1...Sxf7!
    • 1.dxc6+?
      • 1...Kxf6
        • 2.Qg5#
      • 1...Bd5!
  • Keys
    • 1.h4!
      • threat
        • 2.Qg5#
      • 1...Kxf6
        • 2.Qg5#
      • 1...Qxd5
        • 2.Qe4#
      • 1...Qxf6
        • 2.Qe4#
      • 1...Bxd5
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(J);XB(c)
      • Threat
        • QAR1(B)
      • Vars
        • K(a);P-FLIGHT,P_SPINQ(b),XP(H)::QAB1(B)
        • Q(b);XP(H)::QAB1(B)
      • Refutation
        • S(d);XS(J)
    • Try
      • P(F);CHECK,XQ(b)
      • Vars
        • K(a);P-FLIGHT,XP(H)::QAB1(B)
      • Refutation
        • B(c);P_PINQ(B),P_SPINB(c)
  • Actual
    • P(C);
    • Threat
      • QAR1(B)
    • Vars
      • K(a);P-FLIGHT,P_SPINQ(b),XP(H)::QAB1(B)
      • Q(b);P_PINQ(B),P_SPINQ(b),XP(F)::QAB1(B)
      • Q(b);XP(H)::QAB1(B)
      • B(c);P_PINQ(B),P_SPINB(c),XP(F)::QAR2(B)
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