MESON Chess Problem Database
Problem Display
PID: 176328 (2B2KR1/8/4Nk2/3R3b/1p3p1r/4P1b1/5q2/2B2Q2 w - - 0 1)
Hannelius, Jan Ingvar
Schach-Echo, 1971
#2
8 + 7
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Bb2#
- 1...Qxf1
- 2.Bb2#
- 1...Qb2
- 2.Bxb2#
- 1...Qf3
- 2.Bb2#
- 1...Be2
- 2.Bb2#
- 1...Qg1
- Tries
- 1.Sc5?
- threat
- 2.Se4#
- 2.Rf5#
- 2.Qa6#
- 1...Qxe3
- 2.Rf5#
- 1...Qxf1
- 2.Se4#
- 2.Bb2#
- 2.Rf5#
- 1...Qa2
- 2.Se4#
- 2.Rf5#
- 1...Qc2
- 2.Qa6#
- 1...Qe2
- 2.Se4#
- 2.Rf5#
- 1...Qg2
- 2.Rf5#
- 2.Qa6#
- 1...Qf3
- 2.Bb2#
- 2.Rf5#
- 2.Qa6#
- 1...Be2
- 2.Se4#
- 2.Bb2#
- 2.Rf5#
- 1...Bf3
- 2.Rf5#
- 2.Qa6#
- 1...Bg4
- 2.Se4#
- 1...Bg6
- 2.Qa6#
- 1...Bf7
- 2.Se4#
- 2.Rf5#
- 1...Be8
- 2.Se4#
- 2.Rf5#
- 1...f3
- 2.Rf5#
- 1...fxe3!
- threat
- 1.Sg5?
- threat
- 2.Se4#
- 2.Sh7#
- 2.Rf5#
- 2.Qa6#
- 1...Qxe3
- 2.Sh7#
- 2.Rf5#
- 1...Qxf1
- 2.Se4#
- 2.Sh7#
- 2.Bb2#
- 2.Rf5#
- 1...fxe3
- 2.Sh7#
- 1...Qa2
- 2.Se4#
- 2.Sh7#
- 2.Rf5#
- 1...Qe2
- 2.Se4#
- 2.Sh7#
- 2.Rf5#
- 1...Qg2
- 2.Sh7#
- 2.Rf5#
- 2.Qa6#
- 1...Qf3
- 2.Sh7#
- 2.Bb2#
- 2.Rf5#
- 2.Qa6#
- 1...Bd1
- 2.Se4#
- 2.Rf5#
- 2.Qa6#
- 1...Be2
- 2.Se4#
- 2.Bb2#
- 2.Rf5#
- 1...Bf3
- 2.Rf5#
- 2.Qa6#
- 1...Bg4
- 2.Se4#
- 1...Bg6
- 2.Qa6#
- 1...Bf7
- 2.Se4#
- 2.Rf5#
- 1...Be8
- 2.Se4#
- 2.Rf5#
- 1...f3
- 2.Sh7#
- 2.Rf5#
- 1...Qc2!
- threat
- 1.Qd3?
- threat
- 2.Rf5#
- 2.Qf5#
- 2.Qd4#
- 1...Qxe3
- 2.Rf5#
- 2.Qf5#
- 1...Qc2
- 2.Rf5#
- 2.Qd4#
- 1...Qb2
- 2.Bxb2#
- 2.Rf5#
- 2.Qf5#
- 1...Qd2
- 2.Rf5#
- 2.Qf5#
- 1...Bg4
- 2.Rg6#
- 2.Qg6#
- 2.Qd4#
- 1...Bg6
- 2.Rxg6#
- 2.Qxg6#
- 2.Qd4#
- 1...f3
- 2.Rf5#
- 2.Qf5#
- 1...fxe3!
- threat
- 1.Qxf2?
- threat
- 2.Bb2#
- 2.Qb2#
- 1...Bxf2
- 2.Bb2#
- 1...Rh2
- 2.Bb2#
- 1...Be2
- 2.Bb2#
- 1...f3!
- threat
- 1.Sc5?
- Keys
- 1.Sxf4!
- threat
- 2.Rf5#
- 2.Qa6#
- 1...Qxe3
- 2.Sxh5#
- 2.Rf5#
- 1...Qxf1
- 2.Bb2#
- 2.Rf5#
- 1...Qxf4
- 2.Bb2#
- 1...Rxf4
- 2.Qa6#
- 1...Bxf4
- 2.Rf5#
- 1...Qa2
- 2.Sxh5#
- 2.Rf5#
- 1...Qc2
- 2.Sxh5#
- 1...Qe2
- 2.Sxh5#
- 2.Rf5#
- 1...Be2
- 2.Bb2#
- 2.Rf5#
- 2.Rg6#
- 1...Bg4
- 2.Rg6#
- 1...Bg6
- 2.Rxg6#
- 2.Qa6#
- 1...Bf7
- 2.Rf5#
- 1...Be8
- 2.Rf5#
- threat
- 1.Sxf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 5
- Sets
- Q(a);N_GUARD,P_SPINP(d)::B(A)
- Q(a);N_GUARD,XQ(B)::B(A)
- Q(a);N_GUARD,P_SPINP(d)::B(A),XQ(a)
- Q(a);N_GUARD::B(A)
- B(f);S_CUTQ(a)::B(A)
- Tries
- Try
- S(E);
- Threat
- DUALS(3)
- Vars
- Q(a);P_SPINP(d),XP(C)::R1(D)
- Q(a);P_SPINP(d)::QAR(B)
- B(f);::S(E)
- B(f);::QAR(B)
- P(d);::R1(D)
- Refutation
- P(d);P_SPINQ(a),XP(C)
- Try
- S(E);
- Threat
- DUALS(4)
- Vars
- P(d);P_SPINQ(a),XP(C)::S(E)
- B(f);::S(E)
- B(f);::QAR(B)
- Refutation
- Q(a);P_SPINP(d)
- Try
- Q(B);
- Threat
- DUALS(3)
- Refutation
- P(d);XP(C)
- Try
- Q(B);P_PINP(d),XQ(a)
- Threat
- DUALS(2)
- Vars
- B(b);N_SPINP(d),XQ(B)::B(A)
- R(e);::B(A)
- B(f);::B(A)
- Refutation
- P(d);
- Try
- Actual
- S(E);XP(d)
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD,P_SPINQ(a),XS(E)::B(A)
- R(e);XS(E)::QAR(B)
- B(b);XS(E)::R1(D)
- Q(a);::QAR(B)+S(E),DCHECK,XB(f)
- B(f);N_GUARD::R1(H)
- B(f);::R1(D)
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).