MESON Chess Problem Database

Problem Display
PID: 40703 (7B/K2P4/b2ppNq1/p1p1kP2/r1R3pn/P5P1/B4N2/1Q2r3 w - - 0 1)

Ellerman, Arnoldo

2nd Prize, Suomen Shakki, 1952

7B/K2P4/b2ppNq1/p1p1kP2/r1R3pn/P5P1/B4N2/1Q2r3

#2

11 + 11

3105 FIDE Album (1945-1955) 1964
133 The Problemist Supplement 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Qb2#
    • 1...Qf7
      • 2.S2xg4#
    • 1...Qh7
      • 2.S2xg4#
    • 1...Qe8
      • 2.S2xg4#
    • 1...Qh6
      • 2.S2xg4#
    • 1...Rc1
      • 2.Qe4#
    • 1...Rd1
      • 2.Qe4#
    • 1...Rf1
      • 2.Qe4#
    • 1...Rg1
      • 2.Qe4#
    • 1...Rh1
      • 2.Qe4#
    • 1...Re4
      • 2.Qxe4#
    • 1...Sxf5
      • 2.Sd3#
    • 1...exf5
      • 2.Qxe1#
  • Tries
    • 1.Qd3?
      • threat
        • 2.S6xg4#
      • 1...Qxf6
        • 2.Sxg4#
      • 1...exf5
        • 2.Qd5#
      • 1...Re4
        • 2.Qxe4#
      • 1...d5!
  • Keys
    • 1.Rf4!
      • threat
        • 2.S6xg4#
      • 1...Qxf6
        • 2.Sxg4#
      • 1...d5
        • 2.Qb8#
      • 1...Rc4
        • 2.Sd3#
      • 1...Bc4
        • 2.Qb2#
      • 1...c4
        • 2.Qxe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 13
  • Sets
    • Q(k);SBLOCK,XP(G)::QAB(A)
    • Q(k);N_GUARD,P_PINP(J)::S(C),XP(c)
    • Q(k);N_GUARD::S(C),XP(c)
    • R(a);N_GUARD::QAR1(A)
    • R(a);N_GUARD::QAR1(A),XR(a)
    • S(d);SBLOCK,XP(G)::S(C)
    • P(j);SBLOCK,XP(G)::QAR(A),XR(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • B(K)+S(H),DCHECK,XP(c)
      • Vars
        • Q(k);N_GUARD,P_SPINQ(k),XS(H)::S(C),XP(c)
        • P(j);N_GUARD,SBLOCK,XP(G)::QAR1(A)
        • R(a);N_GUARD::QAR1(A),XR(a)
      • Refutation
        • P(i);
  • Actual
    • R(F);
    • Threat
      • B(K)+S(H),DCHECK,XP(c)
    • Vars
      • Q(k);N_GUARD,P_SPINQ(k),XS(H)::S(C),XP(c)
      • P(i);OGATEB::QAB(A)
      • R(b);S_CUTB(h)::S(C)
      • B(h);S_CUTR(b)::QAB(A)
      • P(f);S_CUTB(h),S_CUTR(b)::QAR(A),XR(a)
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Developed and maintained by Brian Stephenson.
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