MESON Chess Problem Database

Problem Display
PID: 229197 (8/8/r4R2/q4R2/b1pk1P2/2rN1QK1/2n5/B7 w - - 0 1)

Zilahi, Zoltan

Nepszava, 1926

8/8/r4R2/q4R2/b1pk1P2/2rN1QK1/2n5/B7

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Rd5#
    • 1...Qb6
      • 2.Rd5#
    • 1...Qc7
      • 2.Rd5#
    • 1...Qd5
      • 2.Rxd5#
    • 1...Bb5
      • 2.Rd5#
  • Tries
    • 1.Bxc3+?
      • 1...Qxc3
        • 2.Rd5#
      • 1...Kxc3!
    • 1.Rd6+?
      • 1...Qd5
        • 2.Rfxd5#
        • 2.Rdxd5#
      • 1...Rxd6!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Rd5#
      • 1...Qxc5
        • 2.Bxc3#
      • 1...Qd8
        • 2.Bxc3#
        • 2.Qxc3#
      • 1...Rd6
        • 2.Rxd6#
      • 1...Bc6
        • 2.Se6#
      • 1...Se3
        • 2.Qe4#
      • 1...Sb4
        • 2.Bxc3#
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(f);N_GUARD::R1(F)
    • Q(f);N_GUARD,P_PINP(E)::R1(F)
    • Q(f);N_GUARD::R1(F),XQ(f)
    • B(c);S_CUTQ(f)::R1(F)
  • Tries
    • Try
      • B(A);CHECK,XR(b)
      • Vars
        • Q(f);SBLOCK,XB(A)::R1(F)
      • Refutation
        • K(e);S_FLIGHT,XB(A)
    • Try
      • R(G);CHECK
      • Refutation
        • R(g);XR(G)
  • Actual
    • S(B);P_SPINQ(C)
    • Threat
      • R1(F)
    • Vars
      • Q(f);N_GUARD,XS(B)::B(A),XR(b)
      • R(g);N_GUARD::R(G),XR(g)
      • B(c);S_CUTR(g)::S(B)
      • S(a);N_PINQ(C)::QAR1(C)
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Developed and maintained by Brian Stephenson.
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