MESON Chess Problem Database

Problem Display
PID: 242318 (6q1/2R1N1n1/8/R2P2Q1/3kp3/8/1n2P3/6K1 w - - 0 1)

Morra, Juan Carlos

Magyar Sakkelet, 1955

6q1/2R1N1n1/8/R2P2Q1/3kp3/8/1n2P3/6K1

#2

7 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Rxd5#
    • 1...Sd1
      • 2.Ra4#
    • 1...Sd3
      • 2.e3#
    • 1...Sa4
      • 2.Rxa4#
    • 1...e3
      • 2.Qf4#
  • Tries
    • 1.Ra4+?
      • 1...Sc4
        • 2.Raxc4#
        • 2.Rcxc4#
      • 1...Sxa4!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qc3#
      • 1...e3
        • 2.Qf4#
      • 1...Sd1
        • 2.Ra4#
      • 1...Sd3
        • 2.e3#
      • 1...Sa4
        • 2.Rxa4#
      • 1...Sc4
        • 2.Sc6#
      • 1...Sf5
        • 2.Sxf5#
      • 1...Sh5
        • 2.Sf5#
      • 1...Se6
        • 2.Sf5#
      • 1...Se8
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(e);OGATE,XP(D)::R1(C),XQ(e)
    • S(a);N_GUARD::R(C)
    • S(a);SBLOCK::P(B)
    • S(a);N_GUARD::R(C),XS(a)
    • P(c);OGATEB::QAR2(E)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • S(a);XR(C)
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • P(c);OGATEB::QAR2(E)
      • S(a);N_GUARD::R(C)
      • S(a);SBLOCK::P(B)
      • S(a);N_GUARD::R(C),XS(a)
      • S(a);SBLOCK::S(G)
      • S(d);N_GUARD,P_PINQ(E)::S(G),XS(d)
      • S(d);N_GUARD,P_PINQ(E)::S(G)
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