MESON Chess Problem Database

Problem Display
PID: 276933 (6r1/4Np1b/qP1NQB2/3PP1p1/1P1kp3/7R/pnr1P3/Kn6 w - - 0 1)

Ellerman, Arnoldo

3/4 Prize, To Mat, 1961

6r1/4Np1b/qP1NQB2/3PP1p1/1P1kp3/7R/pnr1P3/Kn6

#2

11 + 11

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.Sc6#
    • 1...Rxe2
      • 2.Sc6#
    • 1...Rc6
      • 2.Sxc6#
    • 1...Rg6
      • 2.Sef5#
    • 1...Bf5
      • 2.Sexf5#
    • 1...Sc3
      • 2.Sc6#
    • 1...Sc4
      • 2.Sc6#
  • Tries
    • 1.Qg4?
      • threat
        • 2.e6#
      • 1...Rg6
        • 2.Qxe4#
      • 1...Sc4
        • 2.Rd3#
      • 1...Sd3!
    • 1.Qxf7?
      • threat
        • 2.e6#
      • 1...Rg6
        • 2.Sef5#
      • 1...Sc4
        • 2.Sc6#
      • 1...Sd3!
  • Keys
    • 1.Qc8!
      • threat
        • 2.e6#
      • 1...Rg6
        • 2.Sdf5#
      • 1...Sd3
        • 2.e3#
      • 1...Sc4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(d);N_GUARD::S(K)
    • R(d);N_GUARD,XP(B)::S(K)
    • R(d);N_GUARD::S(K),XR(d)
    • R(k);S_CUTB(j)::S(K)
    • B(j);N_GUARD::S(K),XB(j)
    • S(a);S_CUTR(d)::S(K)
    • S(c);S_CUTR(d)::S(K)
  • Tries
    • Try
      • Q(I);P_PINP(f)
      • Threat
        • B(J)+P(F)
      • Vars
        • R(k);S_CUTB(j)::QAR1(I),XP(f)
        • S(c);N_GUARD,S_CUTQ(h)::R1(C)
      • Refutation
        • S(c);
    • Try
      • Q(I);XP(i)
      • Threat
        • B(J)+P(F)
      • Vars
        • R(k);S_CUTB(j)::S(K)
        • S(c);S_CUTR(d)::S(K)
      • Refutation
        • S(c);
  • Actual
    • Q(I);
    • Threat
      • B(J)+P(F)
    • Vars
      • R(k);S_CUTB(j)::S(H)
      • S(c);SBLOCK::P(B)
      • S(c);S_CUTR(d)::QAB1(I)
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