MESON Chess Problem Database
Problem Display
PID: 203202 (1B6/p1Q5/P4p2/N2knP2/4n3/2P2P2/8/K7 w - - 0 1)
van Beek, Huibrecht
2nd Prize, Noord-Hollandsch Dagblad, 1924
#2
8 + 5
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Sd2
- 2.Qd6#
- 1...Sf2
- 2.Qd6#
- 1...Sxc3
- 2.Qd6#
- 1...Sg3
- 2.Qd6#
- 1...Sc5
- 2.Qd6#
- 1...Sg5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd3
- 2.Qc4#
- 2.Qc6#
- 1...Sxf3
- 2.Qc4#
- 2.Qc6#
- 1...Sc4
- 2.Qxc4#
- 2.Qc6#
- 1...Sg4
- 2.Qc4#
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sg6
- 2.Qc4#
- 2.Qc6#
- 1...Sd7
- 2.Qc4#
- 2.Qc6#
- 1...Sf7
- 2.Qc4#
- 2.Qc6#
- 1...Sd2
- Tries
- 1.Ka2?
- 1...Sxf3
- 2.Qc4#
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sd2
- 2.Qd6#
- 1...Sf2
- 2.Qd6#
- 1...Sg3
- 2.Qd6#
- 1...Sc5
- 2.Qd6#
- 1...Sg5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd3
- 2.Qc4#
- 2.Qc6#
- 1...Sc4
- 2.Qxc4#
- 2.Qc6#
- 1...Sg4
- 2.Qc4#
- 2.Qc6#
- 1...Sg6
- 2.Qc4#
- 2.Qc6#
- 1...Sd7
- 2.Qc4#
- 2.Qc6#
- 1...Sf7
- 2.Qc4#
- 2.Qc6#
- 1...Sxc3+!
- 1...Sxf3
- 1.Kb2?
- 1...Sc4+
- 2.Qxc4#
- 1...Sxc3
- 2.Qd6#
- 1...Sxf3
- 2.Qc4#
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sd2
- 2.Qd6#
- 1...Sf2
- 2.Qd6#
- 1...Sg3
- 2.Qd6#
- 1...Sc5
- 2.Qd6#
- 1...Sg5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sg4
- 2.Qc4#
- 2.Qc6#
- 1...Sg6
- 2.Qc4#
- 2.Qc6#
- 1...Sd7
- 2.Qc4#
- 2.Qc6#
- 1...Sf7
- 2.Qc4#
- 2.Qc6#
- 1...Sd3+!
- 1...Sc4+
- 1.Bxa7?
- 1...Sxc3
- 2.Qc5#
- 1...Sxf3
- 2.c4#
- 1...Sd2
- 2.Qc5#
- 1...Sf2
- 2.Qc5#
- 1...Sg3
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sg5
- 2.Qc5#
- 1...Sd6
- 2.Qc5#
- 1...Sd3
- 2.c4#
- 1...Sg4
- 2.c4#
- 1...Sc6
- 2.c4#
- 1...Sg6
- 2.c4#
- 1...Sd7
- 2.c4#
- 1...Sf7
- 2.c4#
- 1...Sc4!
- 1...Sxc3
- 1.Qb6?
- threat
- 2.Qd4#
- 1...Sxc3
- 2.Qd6#
- 1...Sxf3
- 2.Qc6#
- 2.c4#
- 1...Sc5
- 2.Qd6#
- 1...Sc6
- 2.Qxc6#
- 2.c4#
- 1...axb6!
- threat
- 1.Qb7+?
- 1...Sc6
- 2.Qxc6#
- 1...Kc5!
- 1...Sc6
- 1.Qd7+?
- 1...Kc5
- 2.Bxa7#
- 1...Sd6
- 2.Qxd6#
- 1...Sxd7!
- 1...Kc5
- 1.Qe7?
- 1...Sxc3
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd2
- 2.Qd6#
- 1...Sf2
- 2.Qd6#
- 1...Sg3
- 2.Qd6#
- 1...Sc5
- 2.Qd6#
- 1...Sg5
- 2.Qd6#
- 1...Sd3
- 2.fxe4#
- 1...Sc4
- 2.fxe4#
- 1...Sg4
- 2.fxe4#
- 1...Sc6
- 2.fxe4#
- 1...Sg6
- 2.fxe4#
- 1...Sd7
- 2.fxe4#
- 1...Sf7
- 2.fxe4#
- 1...Sxf3!
- 1...Sxc3
- 1.c4+?
- 1...Sxc4
- 2.Qxc4#
- 1...Kd4!
- 1...Sxc4
- 1.Ka2?
- Keys
- 1.Sb3!
- 1...Sxc3
- 2.Qc5#
- 1...Sxf3
- 2.c4#
- 1...Sc5
- 2.Qxc5#
- 1...Sc6
- 2.Qf7#
- 1...Sd2
- 2.Qc5#
- 1...Sf2
- 2.Qc5#
- 1...Sg3
- 2.Qc5#
- 1...Sg5
- 2.Qc5#
- 1...Sd6
- 2.Qc5#
- 1...Sd3
- 2.c4#
- 1...Sc4
- 2.Qb7#
- 1...Sg4
- 2.c4#
- 1...Sg6
- 2.c4#
- 1...Sd7
- 2.c4#
- 1...Sf7
- 2.c4#
- 1...Sxc3
- 1.Sb3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::QAR1(G)
- S(a);N_GUARD,XP(B)::QAR1(G)
- S(a);N_GUARD::QAR1(G),XS(a)
- S(c);N_GUARD::QAB1(G),XS(c)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- S(c);N_GUARD::QAB1(G),XS(c)
- S(a);N_GUARD::QAR1(G)
- S(a);N_GUARD::QAR1(G),XS(a)
- Refutation
- S(a);CHECK,XP(B)
- Try
- K(A);S_FLIGHT
- Vars
- S(c);CHECK,N_GUARD::QAB1(G),XS(c)
- S(a);N_GUARD,XP(B)::QAR1(G)
- S(c);N_GUARD::QAB1(G),XS(c)
- S(a);N_GUARD::QAR1(G)
- S(a);N_GUARD::QAR1(G),XS(a)
- Refutation
- S(c);CHECK
- Try
- B(H);XP(e)
- Vars
- S(a);N_GUARD,XP(B)::QAR1(G)
- S(c);N_GUARD,XP(C)::P(B)
- S(a);N_GUARD::QAR1(G)
- S(a);N_GUARD::QAR1(G),XS(a)
- S(c);N_GUARD::P(B)
- Refutation
- S(c);
- Try
- Q(G);
- Threat
- QAR1(G)
- Vars
- S(a);N_GUARD,XP(B)::QAR1(G)
- S(a);N_GUARD::QAR1(G)
- Refutation
- P(e);XQ(G)
- Try
- Q(G);CHECK
- Vars
- S(c);N_GUARD,P_SPINS(c)::QAB1(G),XS(c)
- Refutation
- K(b);P-FLIGHT
- Try
- Q(G);CHECK
- Vars
- K(b);P-FLIGHT::B(H),XP(e)
- S(a);N_GUARD,P_SPINS(a)::QAR1(G),XS(a)
- Refutation
- S(c);XQ(G)
- Try
- Q(G);
- Vars
- S(a);N_GUARD,XP(B)::QAR1(G)
- S(a);N_GUARD::QAR1(G),XS(a)
- S(a);N_GUARD::QAR1(G)
- S(c);::P(C),XS(a)
- Refutation
- S(c);XP(C)
- Try
- P(B);CHECK
- Vars
- S(c);OGATE,XP(B)::QAB1(G),XS(c)
- Refutation
- K(b);P-FLIGHT
- Try
- Actual
- S(D);
- Vars
- S(a);N_GUARD,XP(B)::QAR1(G)
- S(c);N_GUARD,XP(C)::P(B)
- S(a);N_GUARD::QAR1(G),XS(a)
- S(c);N_GUARD,SBLOCK::QAB(G)
- S(a);N_GUARD::QAR1(G)
- S(c);N_GUARD::P(B)
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).