MESON Chess Problem Database
Problem Display
PID: 256949 (7B/7B/3P3P/1n1p1N2/4kpR1/q4pPK/6n1/3Q4 w - - 0 1)
Maleika, Gerhard
StrateGems, 2021
#2
9 + 7
SOLUTION
- SOUND
- Sets
- 1...Qb4
- 2.Qc2#
- 1...Qxd6
- 2.Qc2#
- 2.Qb1#
- 1...Qa1
- 2.Qc2#
- 1...Qe3
- 2.Sd4#
- 2.Sh4#
- 2.Se7#
- 1...Qa5
- 2.Qc2#
- 2.Qb1#
- 1...Qa6
- 2.Qc2#
- 2.Qb1#
- 1...Qa7
- 2.Qc2#
- 2.Qb1#
- 1...Qa8
- 2.Qc2#
- 2.Qb1#
- 1...Se1
- 2.Rxf4#
- 1...Se3
- 2.Rxf4#
- 1...Sh4
- 2.Rxf4#
- 1...Sc3
- 2.Qc2#
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sxd6
- 2.Qd4#
- 1...Sa7
- 2.Qd4#
- 1...Sc7
- 2.Qd4#
- 1...Qb4
- Tries
- 1.Bd4?
- threat
- 2.Se3#
- 2.Sh4#
- 2.Se7#
- 2.Sg7#
- 1...Qxd6
- 2.Sxd6#
- 2.Qc2#
- 2.Qb1#
- 1...Sxd4
- 2.Qxd4#
- 1...Sxd6
- 2.Sxd6#
- 1...Qe3
- 2.Sxe3#
- 2.Sh4#
- 2.Se7#
- 2.Sg7#
- 1...Qa7
- 2.Se7#
- 2.Sg7#
- 2.Qc2#
- 2.Qb1#
- 1...Se3
- 2.Sxe3#
- 2.Rxf4#
- 1...Sh4
- 2.Sxh4#
- 2.Rxf4#
- 1...Qd3!
- threat
- 1.Qe2+?
- 1...Qe3
- 2.Sxe3#
- 2.Sd4#
- 2.Sh4#
- 2.Se7#
- 1...Se3
- 2.Sxe3#
- 2.Sd4#
- 2.Sh4#
- 2.Se7#
- 2.Rxf4#
- 1...fxe2!
- 1...Qe3
- 1.Qb3?
- threat
- 2.Se3#
- 2.Sd4#
- 2.Sh4#
- 2.Se7#
- 1...Qxd6
- 2.Sxd6#
- 2.Qc2#
- 2.Qb1#
- 1...Sxd6
- 2.Sxd6#
- 1...Sc3
- 2.Qc2#
- 1...Qa7
- 2.Se7#
- 2.Qc2#
- 2.Qb1#
- 1...Se3
- 2.Sxe3#
- 2.Rxf4#
- 1...Sh4
- 2.Sxh4#
- 2.Rxf4#
- 1...Sd4
- 2.Sxd4#
- 1...f2
- 2.Sd4#
- 2.Sh4#
- 2.Se7#
- 1...d4
- 2.Se3#
- 2.Sxd4#
- 2.Sh4#
- 2.Se7#
- 1...Qxb3!
- threat
- 1.Qc1?
- threat
- 2.Se3#
- 2.Sd4#
- 2.Sh4#
- 2.Se7#
- 1...Kd3
- 2.Sd4#
- 1...Qxd6
- 2.Sxd6#
- 2.Qb1#
- 2.Qc2#
- 1...Sxd6
- 2.Sxd6#
- 1...f2
- 2.Sd4#
- 2.Sh4#
- 1...d4
- 2.Se3#
- 2.Se7#
- 1...Qe3
- 2.Sxe3#
- 2.Sd4#
- 2.Sh4#
- 2.Se7#
- 1...Qa7
- 2.Se7#
- 2.Qb1#
- 2.Qc2#
- 1...Se3
- 2.Sxe3#
- 1...Sh4
- 2.Sxh4#
- 1...Sd4
- 2.Sxd4#
- 1...Qxc1!
- threat
- 1.Qe1+?
- 1...Kd3
- 2.Se3#
- 1...Qe3
- 2.Sxe3#
- 2.Sd4#
- 2.Sh4#
- 2.Se7#
- 1...Se3
- 2.Sxe3#
- 2.Sd4#
- 2.Sh4#
- 2.Se7#
- 1...Sxe1!
- 1...Kd3
- 1.Bd4?
- Keys
- 1.Qd2!
- threat
- 2.Se3#
- 2.Sd4#
- 2.Sh4#
- 2.Se7#
- 1...Qxd6
- 2.Sxd6#
- 2.Qc2#
- 1...Sxd6
- 2.Sxd6#
- 2.Qd4#
- 1...f2
- 2.Sd4#
- 2.Sh4#
- 1...d4
- 2.Se3#
- 2.Se7#
- 1...Qe3
- 2.Sxe3#
- 2.Sd4#
- 2.Sh4#
- 2.Se7#
- 1...Qa7
- 2.Se7#
- 2.Qc2#
- 1...Se3
- 2.Sxe3#
- 2.Rxf4#
- 1...Sh4
- 2.Sxh4#
- 2.Rxf4#
- 1...Sd4
- 2.Sxd4#
- 2.Qxd4#
- threat
- 1.Qd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 9
- Sets
- Q(b);N_GUARD::QAB(A)
- S(a);N_GUARD::R1(D),XP(e)
- S(f);N_GUARD::QAR1(A),XS(f)
- S(f);N_GUARD,XP(F)::QAR1(A)
- S(f);N_GUARD::QAR1(A)
- Tries
- Try
- B(I);
- Threat
- DUALS(4)
- Vars
- S(f);OGATE,XB(I)::QAR1(A),XS(f)
- S(f);XP(F)::B(H)+S(E),DCHECK,XS(f)
- Refutation
- Q(b);
- Try
- Q(A);CHECK
- Refutation
- P(c);P_PINP(B),XQ(A)
- Try
- Q(A);
- Threat
- DUALS(4)
- Vars
- S(f);XP(F)::B(H)+S(E),DCHECK,XS(f)
- S(f);S_CUTQ(b)::QAB(A)
- S(f);::B(H)+S(E),XS(f)
- Refutation
- Q(b);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(4)
- Vars
- K(d);N_SPINP(e),S_FLIGHT::B(H)+S(E)
- S(f);XP(F)::B(H)+S(E),DCHECK,XS(f)
- S(a);::B(H)+S(E),XS(a)
- S(f);::B(H)+S(E),XS(f)
- Refutation
- Q(b);XQ(A)
- Try
- Q(A);CHECK
- Vars
- K(d);N_SPINP(e),S_FLIGHT::B(H)+S(E)
- Refutation
- S(a);XQ(A)
- Try
- Actual
- Q(A);
- Threat
- DUALS(4)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).