MESON Chess Problem Database
Problem Display
PID: 287092 (2RnKb2/3NP3/3k2n1/3N1P2/B1p2P2/1p6/3Q4/3bq3 w - - 0 1)
Hartong, Jan
The Problemist, 1952
#2
9 + 8
| 6490 | yacpdb | 2026 |
SOLUTION
- SOUND
- Sets
- 1...Qg3
- 2.Se3#
- 1...Qh4
- 2.Sc3#
- 2.Se3#
- 2.Sb4#
- 2.S5b6#
- 2.S5f6#
- 2.Sc7#
- 1...Qg1
- 2.Se3#
- 1...Qe3
- 2.Sxe3#
- 1...Qxe7+
- 2.Sxe7#
- 1...Se5
- 2.exf8Q#
- 2.exf8B#
- 1...Sc6
- 2.Rxc6#
- 1...Se6
- 2.Rc6#
- 1...Sb7
- 2.Rc6#
- 1...Sf7
- 2.Rc6#
- 1...Qg3
- Tries
- 1.Se5?
- threat
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 1...Qxd2
- 2.exd8Q#
- 2.exd8R#
- 1...Bxe7
- 2.Sxc4#
- 1...Sxf4
- 2.Sxc4#
- 1...Sxe5
- 2.exf8Q#
- 2.exf8B#
- 1...Sxe7
- 2.Sxc4#
- 1...Sc6
- 2.Rxc6#
- 1...Qf2
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 1...Qg3
- 2.Se3#
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 1...Qh4
- 2.Sc3#
- 2.Se3#
- 2.Sb4#
- 2.Sb6#
- 2.Sf6#
- 2.Sxc4#
- 1...Qf1
- 2.exd8Q#
- 2.exd8R#
- 1...Qg1
- 2.Se3#
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 1...Qh1
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 1...Qe2
- 2.exd8Q#
- 2.exd8R#
- 1...Qe3
- 2.Sxe3#
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 1...Qe4
- 2.exd8Q#
- 2.exd8R#
- 1...Bc2
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 1...Be2
- 2.exd8Q#
- 2.exd8R#
- 1...Bf3
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 1...Bg4
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 1...Bh5
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 1...Bh6
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 1...Bg7
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 1...Sh4
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 2.exf8Q#
- 2.exf8B#
- 1...Sh8
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 2.exf8Q#
- 2.exf8B#
- 1...Se6
- 2.Sxc4#
- 2.Sf7#
- 2.Rc6#
- 1...Sb7
- 2.Sxc4#
- 2.Sf7#
- 2.Rc6#
- 1...Sf7
- 2.Sxc4#
- 2.Sxf7#
- 2.Rc6#
- 1...b2
- 2.Sxc4#
- 2.exd8Q#
- 2.exd8R#
- 1...c3
- 2.Sc4#
- 2.exd8Q#
- 2.exd8R#
- 1...Qxe5!
- threat
- 1.Qd4?
- threat
- 2.Sc3#
- 2.Se3#
- 2.Sb4#
- 2.S5b6#
- 2.S5f6#
- 2.Sc7#
- 2.Qc5#
- 1...Qxe7+
- 2.Sxe7#
- 1...Sxf4
- 2.Sxf4#
- 2.Qc5#
- 1...Sxe7
- 2.Sxe7#
- 2.Qc5#
- 1...Qd2
- 2.Qc5#
- 1...Qf2
- 2.Se3#
- 1...Qc3
- 2.Sxc3#
- 2.Qc5#
- 1...Qb4
- 2.Sc3#
- 2.Se3#
- 2.Sxb4#
- 2.S5b6#
- 2.S5f6#
- 2.Sc7#
- 1...Qg1
- 2.Se3#
- 1...Qh1
- 2.Qc5#
- 1...Qe3
- 2.Sxe3#
- 1...Qe4
- 2.Qc5#
- 1...Qe5
- 2.Qc5#
- 1...Qe6
- 2.Qc5#
- 1...Bf3
- 2.Qc5#
- 1...Bg7
- 2.S5f6#
- 2.Qc5#
- 1...Sc6
- 2.Rxc6#
- 2.Qc5#
- 1...Se6
- 2.Rc6#
- 1...Sb7
- 2.Sc3#
- 2.Se3#
- 2.Sb4#
- 2.S5b6#
- 2.S5f6#
- 2.Sc7#
- 2.Rc6#
- 1...c3
- 2.Sxc3#
- 2.Se3#
- 2.Sb4#
- 2.S5b6#
- 2.S5f6#
- 2.Sc7#
- 2.Qc5#
- 1...Qa5!
- threat
- 1.Se5?
- Keys
- 1.S7b6!
- threat
- 2.Sxc4#
- 1...Qxe7+
- 2.Sxe7#
- 1...Qxd2
- 2.exd8Q#
- 2.exd8R#
- 1...Sc6
- 2.Rxc6#
- 1...Qf1
- 2.Qb4#
- 2.exd8Q#
- 2.exd8R#
- 1...Qe2
- 2.Qb4#
- 1...Qe4
- 2.Qb4#
- 1...Be2
- 2.exd8Q#
- 2.exd8R#
- 1...Se5
- 2.exf8Q#
- 2.exf8B#
- 1...c3
- 2.Sc4#
- threat
- 1.S7b6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 6
- Sets
- Q(b);N_GUARD,N_PINP(G)::QAR(A)+S(D)
- Q(b);N_GUARD::QAR(A)+S(D),XQ(b)
- Q(b);CHECK,XP(G)::QAR(A)+S(D),XQ(b)
- S(f);N_PINP(G)::PXB(h)=Q
- S(g);N_GUARD::R1(H),XS(g)
- S(g);N_GUARD,N_PINP(G)::R1(H)
- S(g);N_GUARD::R1(H)
- Tries
- Try
- S(F);N_SPINP(G)
- Threat
- DUALS(3)
- Vars
- Q(b);XQ(A)::PXS(g)=Q
- B(h);XP(G)::S(F),XP(d)
- S(f);XP(C)::S(F),XP(d)
- S(f);N_GUARD,XS(F)::PXB(h)=Q
- S(f);XP(G)::S(F),XP(d)
- S(g);N_GUARD::R1(H),XS(g)
- Q(b);::PXS(g)=Q
- B(a);::PXS(g)=Q
- Refutation
- Q(b);P_PINP(G),XS(F)
- Try
- Q(A);
- Threat
- DUALS(7)
- Vars
- Q(b);CHECK,XP(G)::QAR(A)+S(D),XQ(b)
- Q(b);N_PINP(G)::QAB1(A)
- Q(b);N_PINP(G)::QAR(A)+S(D)
- Q(b);::QAR(A)+S(D),XQ(b)
- Q(b);::QAB1(A)
- B(a);::QAB1(A)
- S(g);N_GUARD,N_PINP(G)::R1(H)
- Refutation
- Q(b);N_PINP(G)
- Try
- Actual
- S(F);
- Threat
- S(F),XP(d)
- Vars
- Q(b);CHECK,XP(G)::QAR(A)+S(D),XQ(b)
- Q(b);N_PINP(G),XQ(A)::PXS(g)=Q
- S(g);N_GUARD::R1(H),XS(g)
- Q(b);N_GUARD::QAB(A)
- B(a);N_PINP(G)::PXS(g)=Q
- S(f);N_PINP(G)::PXB(h)=Q
- P(d);::S(F)
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).