MESON Chess Problem Database

Problem Display
PID: 168992 (8/8/5n1B/7B/2R1p2Q/4nR1p/3kpN2/1KN5 w - - 0 1)

Lilu, Zhorzh Aleksandrovich

2nd Comm., SuperProblem, 2014

8/8/5n1B/7B/2R1p2Q/4nR1p/3kpN2/1KN5

#2

8 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...e1Q
      • 2.Rc2#
    • 1...e1S
      • 2.Bxe3#
    • 1...e1B
      • 2.Bxe3#
      • 2.Rc2#
    • 1...e1R
      • 2.Rc2#
  • Tries
    • 1.Sfd3?
      • threat
        • 2.Qe1#
      • 1...Kd1
        • 2.Qe1#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Rf2#
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...exd3!
    • 1.Sxe4+?
      • 1...Kd1
        • 2.Rd4#
      • 1...Sxe4!
    • 1.Rxe3?
      • threat
        • 2.Rxe2#
      • 1...e1Q
        • 2.Re2#
        • 2.Rd3#
        • 2.Rc2#
        • 2.Rd4#
      • 1...e1S
        • 2.Sb3#
        • 2.Re2#
        • 2.Rd3#
        • 2.Rexe4#
      • 1...e1B
        • 2.Sb3#
        • 2.Re2#
        • 2.Rd3#
        • 2.Rexe4#
        • 2.Rc2#
        • 2.Rd4#
      • 1...e1R
        • 2.Re2#
        • 2.Rd3#
        • 2.Rc2#
        • 2.Rd4#
      • 1...Ke1!
    • 1.Rd4+?
      • 1...Ke1
        • 2.Sd1#
        • 2.Sh1#
        • 2.Sxh3#
        • 2.Sxe4#
        • 2.Sg4#
      • 1...Kc3!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Rd4#
      • 1...Kxd1
        • 2.Rd4#
      • 1...exd1Q
        • 2.Bxe3#
      • 1...exd1S
        • 2.Rc2#
      • 1...exd1B
        • 2.Bxe3#
      • 1...exd1R
        • 2.Bxe3#
        • 2.Rc2#
        • 2.Qf2#
      • 1...e1S
        • 2.Rf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • P(b);P_PINS(B),SBLOCK::R1(E)
    • P(b);SBLOCK::B(H),XS(c)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(F)
      • Vars
        • K(a);N_SPINS(c),P-FLIGHT::QAR1(F)
        • P(b);P_PINS(B)::QAB1(F),XQ(b)
        • P(b);::QAB1(F),XB(b)
        • P(b);P_PINS(B)::QAB1(F),XR(b)
      • Refutation
        • P(e);XS(C)
    • Try
      • S(C);CHECK,XP(e)
      • Vars
        • K(a);N_SPINS(c),P-FLIGHT::R(E)
      • Refutation
        • S(f);XS(C)
    • Try
      • R(D);XS(c)
      • Threat
        • B(H)+R(D),DCHECK,XP(b)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • R(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • R(E)
    • Vars
      • K(a);N_SPINS(c),P-FLIGHT,XS(C)::R(E)
      • P(b);P_PINS(B),SBLOCK,XS(C)::B(H),XS(c)
      • P(b);SBLOCK,XS(C)::R1(E)
      • P(b);SBLOCK,XS(C)::B(H),XS(c)
      • P(b);OGATEB,SBLOCK::R(D)
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