MESON Chess Problem Database

Problem Display
PID: 179926 (2R5/p7/4N2B/R4K2/2P5/1pkN4/1p2p2p/bQ6 w - - 0 1)

Gross, Erwin

Schakend Nederland, 1986

2R5/p7/4N2B/R4K2/2P5/1pkN4/1p2p2p/bQ6

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sb4?
      • threat
        • 2.Sd5#
        • 2.Qe1#
      • 1...Kxb4
        • 2.Bd2#
        • 2.Qe1#
      • 1...e1Q
        • 2.Sd5#
        • 2.Qxe1#
      • 1...e1S
        • 2.Sd5#
        • 2.Qxe1#
      • 1...e1B
        • 2.Sd5#
        • 2.Qxe1#
      • 1...e1R
        • 2.Sd5#
        • 2.Qxe1#
      • 1...h1B
        • 2.Qe1#
      • 1...h1R
        • 2.Sd5#
      • 1...h1Q!
    • 1.Sd4?
      • threat
        • 2.Sxe2#
        • 2.Sb5#
      • 1...e1Q
        • 2.Sb5#
      • 1...e1S
        • 2.Se2#
        • 2.Sb5#
      • 1...e1B
        • 2.Se2#
        • 2.Sb5#
      • 1...e1R
        • 2.Sb5#
      • 1...a6
        • 2.Sxe2#
      • 1...Kxd4!
    • 1.Sc7?
      • threat
        • 2.Sb5#
      • 1...Kxc4
        • 2.Se6#
      • 1...Kd4
        • 2.Sb5#
      • 1...a6!
    • 1.Qc2+?
      • 1...bxc2
        • 2.Ra3#
      • 1...Kxc2!
    • 1.Qxb2+?
      • 1...Kxd3
        • 2.Rd5#
        • 2.Qd2#
      • 1...Bxb2!
  • Keys
    • 1.Qe1+!
      • 1...Kc2
        • 2.Sb4#
      • 1...Kxd3
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAB(A)
        • P(d);::S(B)
      • Refutation
        • P(d);
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::S(F)
        • P(g);::S(F),XP(c)
      • Refutation
        • K(f);S_FLIGHT,XS(F)
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • K(f);P-FLIGHT,XP(C)::R(H)+S(F)
        • K(f);S_FLIGHT::S(F)
      • Refutation
        • P(g);
    • Try
      • Q(A);CHECK
      • Vars
        • P(e);SBLOCK,XQ(A)::R(D)
      • Refutation
        • K(f);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK,XP(b)
      • Refutation
        • B(a);XQ(A)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(f);P-FLIGHT::S(B)
      • K(f);P-FLIGHT,XS(B)::QAR1(A)
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