MESON Chess Problem Database

Problem Display
PID: 236496 (8/rp5B/4R1N1/2p2n2/3p1p2/3N1kbK/1Qn3R1/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Rochade Europa, 2001

8/rp5B/4R1N1/2p2n2/3p1p2/3N1kbK/1Qn3R1/8

#2

7 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxb7#
    • 1...Ra2
      • 2.Qxb7#
    • 1...Ra3
      • 2.Qxb7#
    • 1...Ra4
      • 2.Qxb7#
    • 1...Ra5
      • 2.Qxb7#
    • 1...Ra8
      • 2.Qxb7#
    • 1...Bf2
      • 2.Rxf2#
    • 1...Bh2
      • 2.Rf2#
    • 1...Sa1
      • 2.Qe2#
    • 1...Se1
      • 2.Qe2#
    • 1...Sa3
      • 2.Qe2#
    • 1...Sce3
      • 2.Qe2#
    • 1...Sb4
      • 2.Qe2#
    • 1...Sfe3
      • 2.Sge5#
  • Tries
    • 1.Se1+?
      • 1...Sxe1
        • 2.Qe2#
      • 1...Bxe1!
    • 1.Rxg3+?
      • 1...Sxg3
        • 2.Sh4#
      • 1...fxg3!
    • 1.Ree2?
      • threat
        • 2.Sde5#
        • 2.Sge5#
      • 1...Bf2
        • 2.Rgxf2#
      • 1...Sfe3
        • 2.Sge5#
      • 1...Sce3!
    • 1.Qxc2?
      • threat
        • 2.Qd1#
        • 2.Qe2#
      • 1...Ra1
        • 2.Qe2#
      • 1...Se3
        • 2.Sde5#
        • 2.Sge5#
        • 2.Qe2#
      • 1...Ra2!
    • 1.Qb3?
      • threat
        • 2.Se1#
        • 2.Qd5#
      • 1...Be1
        • 2.Sxe1#
        • 2.Qd5#
      • 1...Se1
        • 2.Sxe1#
        • 2.Qd1#
        • 2.Qd5#
      • 1...Sb4
        • 2.Se1#
        • 2.Qd1#
      • 1...Sfe3
        • 2.Sge5#
      • 1...Sd6
        • 2.Se1#
      • 1...Se7
        • 2.Se1#
      • 1...c4
        • 2.Se1#
      • 1...Sce3!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qd1#
      • 1...Ra1
        • 2.Qxb7#
      • 1...Sce3
        • 2.Sde5#
      • 1...Sfe3
        • 2.Sge5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 11
  • Sets
    • R(h);N_GUARD::QAB(A),XP(i)
    • B(c);N_GUARD::R1(B),XB(c)
    • B(c);N_GUARD::R1(B)
    • S(a);OGATE::QAB1(A)
    • S(g);SBLOCK::S(F)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • S(a);OGATE,XS(C)::QAB1(A)
      • Refutation
        • B(c);XS(C)
    • Try
      • R(B);CHECK,XB(c)
      • Vars
        • S(g);XR(B)::S(F)
      • Refutation
        • P(e);XR(B)
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);N_GUARD::R1(B),XB(c)
        • S(g);::S(F)
      • Refutation
        • S(a);
    • Try
      • Q(A);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);::QAB1(A)
      • Refutation
        • R(h);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);SBLOCK::S(F)
        • S(g);::QAR(A)+S(C),DCHECK
        • P(f);::QAR(A)+S(C),DCHECK
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • R(h);N_GUARD::QAB(A),XP(i)
      • S(a);SBLOCK::S(C)
      • S(g);SBLOCK::S(F)
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