MESON Chess Problem Database

Problem Display
PID: 151156 (2r5/q1p2Rb1/P1P5/1p1ppPQ1/3kPP2/1KRpp3/8/4Nb1B w - - 0 1)

Albarda, Johannes

Verdonk MT, 1977

2r5/q1p2Rb1/P1P5/1p1ppPQ1/3kPP2/1KRpp3/8/4Nb1B

#2

11 + 11

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...d2
      • 2.Sc2#
    • 1...e2
      • 2.Qg1#
    • 1...dxe4
      • 2.Rd7#
    • 1...exf4
      • 2.Qxg7#
  • Tries
    • 1.Qxg7?
      • threat
        • 2.Qxe5#
      • 1...e2
        • 2.Qg1#
      • 1...Re8!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qb4#
      • 1...dxe4
        • 2.Qd7#
      • 1...exf4
        • 2.Sf3#
      • 1...e2
        • 2.Rxd3#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Bf8
        • 2.Qxe5#
      • 1...d2
        • 2.Sc2#
      • 1...b4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::S(A)
    • P(c);OGATEB::QAB(H)
    • P(f);OGATEB,XP(E)::R(K)
    • P(g);OGATEB,XP(F)::QAB(H),XB(j)
  • Tries
    • Try
      • Q(H);P_PINP(g),XB(j)
      • Threat
        • QAB1(H),XP(g)
      • Vars
        • P(c);OGATEB::QAB(H)
      • Refutation
        • R(k);
  • Actual
    • Q(H);
    • Threat
      • QAR2(H)
    • Vars
      • P(f);OGATEB,XP(E)::QAR(H)
      • P(g);XP(F)::S(A)
      • P(c);S_CUTB(a)::R1(D),XP(b)
      • Q(h);N_GUARD::QAB1(H),XQ(h)
      • B(j);N_GUARD::QAB1(H),XP(g)
      • P(b);N_GUARD::S(A)
      • P(e);::QAR2(H),XP(e)
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