MESON Chess Problem Database

Problem Display
PID: 232441 (3K4/4N3/pp1k4/R1p5/n3R3/2rp1p2/1Q3b1p/8 w - - 0 1)

Dietrich, Albert

Freie Presse, 1976

3K4/4N3/pp1k4/R1p5/n3R3/2rp1p2/1Q3b1p/8

#2

5 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qe5#
      • 2.Qf6#
    • 1...Rc2
      • 2.Qe5#
      • 2.Qf6#
    • 1...Ra3
      • 2.Qe5#
      • 2.Qf6#
    • 1...Rb3
      • 2.Qe5#
      • 2.Qf6#
    • 1...Rc4
      • 2.Qe5#
      • 2.Qf6#
    • 1...c4
      • 2.Rd5#
    • 1...bxa5
      • 2.Qb8#
  • Tries
    • 1.Raxa4?
      • threat
        • 2.Qxb6#
      • 1...Rb3
        • 2.Qe5#
        • 2.Qf6#
      • 1...b5
        • 2.Rxa6#
      • 1...c4!
    • 1.Qxf2?
      • threat
        • 2.Qg3#
        • 2.Qxh2#
      • 1...h1Q
        • 2.Qg3#
      • 1...h1B
        • 2.Qg3#
        • 2.Qh2#
      • 1...h1R
        • 2.Qg3#
      • 1...Rc2
        • 2.Qg3#
      • 1...h1S!
  • Keys
    • 1.Rxc5!
      • threat
        • 2.Rd5#
      • 1...Kxc5
        • 2.Qb4#
      • 1...Rxc5
        • 2.Qf6#
      • 1...Bxc5
        • 2.Qxh2#
      • 1...Sxc5
        • 2.Qxb6#
      • 1...bxc5
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • P(g);OGATE::R1(C)
    • P(i);OGATE,XR(C)::QAB(A)
  • Tries
    • Try
      • R(C);XS(f)
      • Threat
        • QAR2(A),XP(i)
      • Vars
        • P(i);OGATEB::R(C),XP(h)
      • Refutation
        • P(g);
    • Try
      • Q(A);XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB(A)
        • R(c);::QAB(A)
      • Refutation
        • P(b);
  • Actual
    • R(C);XP(g)
    • Threat
      • R1(C)
    • Vars
      • K(j);OGATEB,S_FLIGHT,XR(C)::QAB1(A)
      • R(c);OGATE,SBLOCK,XR(C)::QAR2(A)
      • B(a);OGATE,SBLOCK,XR(C)::QAB(A),XP(b)
      • S(f);N_GUARD,XR(C)::QAR2(A),XP(i)
      • P(i);OGATE,SBLOCK,XR(C)::QAB(A)
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