MESON Chess Problem Database

Problem Display
PID: 235198 (2k3bR/1p2Rp2/N2p3r/B2p2r1/8/2p5/K4p2/3Q4 w - - 0 1)

Heyl, Peter

Schach, 2002

2k3bR/1p2Rp2/N2p3r/B2p2r1/8/2p5/K4p2/3Q4

#2

6 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Rxg8#
    • 1...Rf5
      • 2.Rxg8#
    • 1...Rgh5
      • 2.Rxg8#
    • 1...c2
      • 2.Qxc2#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qxc3#
        • 2.Qxb7#
      • 1...bxa6
        • 2.Qb7#
      • 1...f1Q
        • 2.Qxb7#
      • 1...f1B
        • 2.Qxb7#
      • 1...Rg3
        • 2.Qxb7#
      • 1...Rg4
        • 2.Qxb7#
      • 1...Rh3
        • 2.Qxb7#
      • 1...Rh4
        • 2.Qxb7#
      • 1...c2
        • 2.Qxc2#
        • 2.Qc3#
        • 2.Qxb7#
      • 1...d4
        • 2.Qxb7#
      • 1...b5
        • 2.Qxc3#
      • 1...b6!
    • 1.Qa4?
      • threat
        • 2.Re8#
        • 2.Qd7#
        • 2.Qe8#
      • 1...bxa6
        • 2.Qe8#
      • 1...b6
        • 2.Qd7#
        • 2.Qe8#
      • 1...Re5
        • 2.Rxg8#
        • 2.Qd7#
        • 2.Qe8#
      • 1...Re6
        • 2.Qd7#
        • 2.Qe8#
      • 1...b5!
  • Keys
    • 1.Qxd5!
      • threat
        • 2.Qxb7#
      • 1...Rxd5
        • 2.Rxg8#
      • 1...bxa6
        • 2.Qb7#
        • 2.Qa8#
      • 1...b6
        • 2.Qa8#
      • 1...b5
        • 2.Qc6#
        • 2.Qb7#
        • 2.Qa8#
      • 1...f5
        • 2.Qc4#
      • 1...f6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(d);N_GUARD::R(F),XB(j)
    • P(b);OGATEB::QAR(A),XP(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(g);XS(D)::QAB1(A)
        • P(a);::QAB1(A),XP(g)
        • R(d);::QAB1(A),XP(g)
        • R(f);::QAB1(A),XP(g)
        • P(c);::QAB1(A),XP(g)
        • P(g);::QAR(A),XP(b)
      • Refutation
        • P(g);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(g);XS(D)::QAR2(A)
      • Refutation
        • P(g);
  • Actual
    • Q(A);XP(c)
    • Threat
      • QAB1(A),XP(g)
    • Vars
      • R(d);N_GUARD,XQ(A)::R(F),XB(j)
      • P(g);OGATE::QAR2(A)
      • P(h);P_PINQ(A),S_CUTR(d)::QAR(A)
      • P(h);N_GUARD,P_PINQ(A),S_CUTR(f)::QAB(A)
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