MESON Chess Problem Database

Problem Display
PID: 99240 (3nK3/3N4/R2N1B2/3knB2/7R/8/4Q2b/3rrb2 w - - 0 1)

Korponai, Jozsef

Magyar Sakkelet, 1953

3nK3/3N4/R2N1B2/3knB2/7R/8/4Q2b/3rrb2

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Qb5#
    • 1...Bh3
      • 2.Qb5#
    • 1...Sd3
      • 2.Rd4#
  • Tries
    • 1.Be4+?
      • 1...Kd4
        • 2.Sb5#
      • 1...Ke6!
    • 1.Qf3+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Sxf3+!
  • Keys
    • 1.Sb7!
      • threat
        • 2.Rd6#
      • 1...Sxd7
        • 2.Be4#
      • 1...Sxb7
        • 2.Be6#
      • 1...Sec6
        • 2.Sb6#
      • 1...Sd3
        • 2.Rd4#
      • 1...Sf3
        • 2.Be4#
      • 1...Sc4
        • 2.Be4#
      • 1...Sg4
        • 2.Be4#
      • 1...Sg6
        • 2.Be4#
      • 1...Sef7
        • 2.Be4#
      • 1...Sdc6
        • 2.Sb6#
      • 1...Sdf7
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 2
  • Sets
    • B(c);N_GUARD::QAR2(A)
    • S(f);P_PINQ(A),S_CUTR(a)::R1(B)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINS(f)::S(E)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(A),XR(b)
      • Refutation
        • S(f);CHECK,XQ(A)
  • Actual
    • S(E);
    • Threat
      • R1(D)
    • Vars
      • S(f);P_PINQ(A),XS(G)::B(C)
      • S(g);N_GUARD,XS(E)::B(C)
      • S(f);P_PINQ(A),SBLOCK::S(G)
      • S(f);P_PINQ(A),S_CUTR(a)::R1(B)
      • S(f);P_PINQ(A)::B(C)
      • S(g);SBLOCK::S(G)
      • S(g);N_GUARD::B(C)
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