MESON Chess Problem Database

Problem Display
PID: 259651 (3K4/1QB2pnN/3Nkr1b/7P/4ppp1/6nq/3P4/4r3 w - - 0 1)

Brogi, Giuseppe

Problem (Zagreb), 1956

3K4/1QB2pnN/3Nkr1b/7P/4ppp1/6nq/3P4/4r3

#2

7 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qxe4#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sd4#
      • 1...Kf5
        • 2.Sd4#
        • 2.Qd5#
      • 1...Se2
        • 2.Qxe4#
      • 1...S3f5
        • 2.Sf8#
      • 1...S7f5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sd4#
      • 1...Kxf5
        • 2.Qd5#
      • 1...Rxf5
        • 2.Qc6#
      • 1...S3xf5
        • 2.Sf8#
      • 1...S7xf5
        • 2.Qb3#
      • 1...Se2
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,S_CUTR(a)::QAR2(D),XP(d)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • S(b);N_GUARD,S_CUTR(a)::QAR2(D),XP(d)
        • S(b);SBLOCK::S(F)
      • Refutation
        • S(k);
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(g);N_GUARD,S_FLIGHT,XS(C)::QAR2(D)
      • R(h);SBLOCK,XS(C)::QAR2(D)
      • S(b);SBLOCK,XS(C)::S(F)
      • S(k);SBLOCK,XS(C)::QAB(D)
      • S(b);N_GUARD,S_CUTR(a)::QAR2(D),XP(d)
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