MESON Chess Problem Database
Problem Display
PID: 242700 (4RB2/q4p1B/2PP4/1P1kP1nK/3N2Q1/1P1N1n2/8/2R1b2b w - - 0 1)
Hartong, Jan
Tijdschrift vd KNSB, 1956
#2
13 + 7
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qc5
- 2.Rxc5#
- 1...Qb8
- 2.Rc5#
- 1...Qa1
- 2.Rc5#
- 1...Qa2
- 2.Rc5#
- 1...Qa4
- 2.Rc5#
- 1...Qa5
- 2.Rc5#
- 1...Qa6
- 2.Rc5#
- 1...Qb7
- 2.Rc5#
- 1...Qc7
- 2.Rc5#
- 1...Qd7
- 2.Rc5#
- 1...Qe7
- 2.Rc5#
- 1...Qa8
- 2.Rc5#
- 1...Bf2
- 2.Sb4#
- 1...Bg3
- 2.Sb4#
- 1...Bb4
- 2.Sxb4#
- 1...Bh4
- 2.Sb4#
- 1...Sd2
- 2.Sb4#
- 1...Sxd4
- 2.Sf4#
- 1...Sxe5
- 2.Rxe5#
- 1...Sh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se6
- 2.Qe4#
- 1...Qc5
- Tries
- 1.Sc2?
- threat
- 2.Qc4#
- 1...Sxe5
- 2.Rxe5#
- 1...Qc5
- 2.Sf4#
- 1...Qa4
- 2.Se3#
- 1...Sd2
- 2.Scb4#
- 1...Sd4
- 2.Se3#
- 1...Se4
- 2.Bxe4#
- 2.Qxe4#
- 1...Qd4!
- threat
- 1.Se2?
- threat
- 2.Sdf4#
- 2.Qc4#
- 1...Sxe5
- 2.Sdf4#
- 2.Rxe5#
- 1...Sxh7
- 2.Qc4#
- 1...Qe3
- 2.Qc4#
- 1...Qc5
- 2.Sdf4#
- 2.Rxc5#
- 1...Qa4
- 2.Rc5#
- 1...Qe7
- 2.Rc5#
- 2.Qc4#
- 1...Bd2
- 2.Qc4#
- 1...Bc3
- 2.Sxc3#
- 2.Qc4#
- 1...Bg3
- 2.Sc3#
- 2.Sb4#
- 2.Qc4#
- 1...Sd2
- 2.Sc3#
- 2.Sb4#
- 2.Sdf4#
- 1...Sd4
- 2.Sef4#
- 2.Sdf4#
- 1...Sh3
- 2.Be4#
- 2.Qc4#
- 2.Qe4#
- 1...Se4
- 2.Sdf4#
- 2.Bxe4#
- 2.Qxe4#
- 1...Se6
- 2.Be4#
- 2.Qc4#
- 2.Qe4#
- 1...f5
- 2.Qc4#
- 1...Qd4!
- threat
- 1.Sxf3?
- threat
- 2.Sf4#
- 2.Qc4#
- 1...Sxf3
- 2.Qc4#
- 2.Qe4#
- 1...Sxh7
- 2.Qc4#
- 1...Qd4
- 2.Qxd4#
- 1...Qe3
- 2.Qc4#
- 1...Qc5
- 2.Sf4#
- 2.Rxc5#
- 1...Qa4
- 2.Rc5#
- 1...Bd2
- 2.Qc4#
- 1...Bc3
- 2.Qc4#
- 1...Bg3
- 2.Sb4#
- 2.Qc4#
- 1...Sh3
- 2.Be4#
- 2.Qc4#
- 2.Qe4#
- 1...Se4
- 2.Sf4#
- 2.Bxe4#
- 2.Qxe4#
- 1...Se6
- 2.Be4#
- 2.Qc4#
- 2.Qe4#
- 1...f5
- 2.Qc4#
- 1...Bxf3!
- threat
- 1.Se6?
- threat
- 2.Qc4#
- 1...Sxe5
- 2.Sdf4#
- 1...Qd4
- 2.Sc7#
- 1...Qc5
- 2.Sc7#
- 2.Rxc5#
- 1...Qa4
- 2.Sc7#
- 2.Rc5#
- 1...Sd4
- 2.Sef4#
- 1...Se4
- 2.Bxe4#
- 2.Qxe4#
- 1...Sd2!
- threat
- 1.Sc2?
- Keys
- 1.Sf5!
- threat
- 2.Qc4#
- 1...Sxe5
- 2.Rxe5#
- 1...Qd4
- 2.Se7#
- 1...Qc5
- 2.Se7#
- 2.Rxc5#
- 1...Qa4
- 2.Se3#
- 2.Se7#
- 2.Rc5#
- 1...Sd2
- 2.Sb4#
- 1...Sd4
- 2.Se3#
- 1...Se4
- 2.Sf4#
- threat
- 1.Sf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 18
- Sets
- Q(f);N_GUARD::R1(A),XQ(f)
- Q(f);N_GUARD::R1(A)
- B(a);N_GUARD::S(C)
- B(a);N_GUARD::S(C),XB(a)
- S(c);S_CUTB(a)::S(C)
- S(c);SBLOCK,XS(D)::S(C)
- S(c);OGATE,XP(G)::R1(L),XS(c)
- S(e);N_GUARD::QAB1(E)
- S(e);N_GUARD::QAB1(E),XS(e)
- Tries
- Try
- S(D);
- Threat
- QAB1(E)
- Vars
- S(c);OGATE,XP(G)::R1(L),XS(c)
- Q(f);SBLOCK::S(C)
- Q(f);N_GUARD::S(D)
- S(c);S_CUTB(a)::S(D)
- S(c);S_CUTQ(f)::S(D)
- Refutation
- Q(f);
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- S(e);XB(K)::QAB1(E)
- Q(f);::QAB1(E)
- Q(f);N_GUARD::R1(A)
- B(a);::QAB1(E)
- P(g);::QAB1(E)
- Refutation
- Q(f);
- Try
- S(D);XS(c)
- Threat
- DUALS(2)
- Vars
- S(e);XB(K)::QAB1(E)
- Q(f);N_GUARD::QAR1(E),XQ(f)
- Q(f);::QAB1(E)
- Q(f);N_GUARD::R1(A)
- B(a);::QAB1(E)
- P(g);::QAB1(E)
- Refutation
- B(b);P_PINQ(E),XS(D)
- Try
- S(D);
- Threat
- QAB1(E)
- Vars
- S(c);SBLOCK,XP(G)::S(C)
- Q(f);N_GUARD::S(D)
- S(c);SBLOCK::S(D)
- Refutation
- S(c);
- Try
- Actual
- S(D);
- Threat
- QAB1(E)
- Vars
- S(c);OGATE,XP(G)::R1(L),XS(c)
- Q(f);N_GUARD::S(D)
- S(c);S_CUTB(a)::S(C)
- S(c);S_CUTQ(f)::S(D)
- S(e);SBLOCK::S(C)
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).