MESON Chess Problem Database
Problem Display
PID: 276365 (K7/1R6/3pp3/P1k2qQ1/BR6/n1NP4/3rp1n1/B6b w - - 0 1)
Kamstra, Hendrik Hermanus
2/3 Prize, To Mat, 1963
#2
9 + 9
| 15601 | Albrecht-Leiss-Degener Collection | 2024 |
SOLUTION
- SOUND
- Sets
- 1...Qd5
- 2.Se4#
- 1...Ra2
- 2.d4#
- 1...Rb2
- 2.d4#
- 1...Rc2
- 2.d4#
- 1...Se1
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sf4
- 2.Qg1#
- 1...Sh4
- 2.Qe3#
- 1...Sb1
- 2.Rc4#
- 1...Sc2
- 2.Rc4#
- 1...Sc4
- 2.Rxc4#
- 1...Sb5
- 2.Rc4#
- 1...d5
- 2.Qe7#
- 1...Qd5
- Tries
- 1.Re4?
- threat
- 2.Rc7#
- 1...Sb5
- 2.Rc4#
- 1...d5
- 2.Qe7#
- 1...Sc4
- 2.Rxc4#
- 1...Qd5!
- threat
- 1.Rf4?
- threat
- 2.Rc7#
- 1...Sxf4
- 2.Qg1#
- 1...Sb5
- 2.Rc4#
- 1...d5
- 2.Qe7#
- 1...Qd5
- 2.Se4#
- 1...Se1
- 2.Qg1#
- 1...Sh4
- 2.Qg1#
- 1...Sc4
- 2.Rxc4#
- 1...Se3!
- threat
- 1.Rg4?
- threat
- 2.Rc7#
- 1...Sb5
- 2.Rc4#
- 1...d5
- 2.Qe7#
- 1...Qd5
- 2.Se4#
- 1...Se1
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sh4
- 2.Qe3#
- 1...Sc4
- 2.Rxc4#
- 1...Sf4!
- threat
- 1.R7b5+?
- 1...Sxb5
- 2.Rc4#
- 1...Kc6!
- 1...Sxb5
- 1.Qd8?
- threat
- 2.Qb6#
- 2.Qc7#
- 2.Qc8#
- 1...Sc4
- 2.Rxc4#
- 1...Sb5
- 2.Rc4#
- 1...Qe4
- 2.Qb6#
- 1...Qh7
- 2.Qb6#
- 1...Qf3
- 2.Qb6#
- 1...Qd5
- 2.Qb6#
- 1...Qf7
- 2.Qb6#
- 1...Se1
- 2.Qb6#
- 1...Se3
- 2.Qb6#
- 1...Sf4
- 2.Qb6#
- 1...Sh4
- 2.Qb6#
- 1...d5
- 2.Qb6#
- 2.Qc7#
- 2.Qe7#
- 1...e5
- 2.Qb6#
- 2.Qc7#
- 1...Qf8!
- threat
- 1.Qxf5+?
- 1...d5
- 2.Se4#
- 2.Qf8#
- 1...e5
- 2.Qc8#
- 1...exf5!
- 1...d5
- 1.Re4?
- Keys
- 1.Rh4!
- threat
- 2.Rc7#
- 1...Sxh4
- 2.Qe3#
- 1...Sf4
- 2.Qg1#
- 1...Sb5
- 2.Rc4#
- 1...d5
- 2.Qe7#
- 1...Qd5
- 2.Se4#
- 1...Se1
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sc4
- 2.Rxc4#
- threat
- 1.Rh4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 5
- Sets
- Q(g);P_PINR(H)::S(B)
- R(b);N_GUARD::P(C)
- S(d);N_GUARD,P_PINR(H)::QAB(G)
- S(d);N_GUARD,P_PINR(H)::QAB(G),XS(d)
- S(d);OGATE,P_PINR(H)::QAB(G)
- S(e);N_GUARD::R1(E)
- S(e);N_GUARD::R1(E),XS(e)
- P(h);N_SPINQ(g),OGATEB::QAB(G)
- Tries
- Try
- R(E);
- Threat
- R(H)
- Vars
- S(e);N_GUARD::R1(E)
- P(h);N_SPINQ(g),OGATEB::QAB(G)
- S(e);N_GUARD::R1(E),XS(e)
- Refutation
- Q(g);P_PINR(H)
- Try
- R(E);
- Threat
- R(H)
- Vars
- S(d);OGATE,P_PINR(H),XR(E)::QAB(G)
- S(e);N_GUARD::R1(E)
- P(h);N_SPINQ(g),OGATEB::QAB(G)
- Q(g);P_PINR(H)::S(B)
- S(d);OGATE,P_PINR(H)::QAB(G)
- S(e);N_GUARD::R1(E),XS(e)
- Refutation
- S(d);P_PINR(H)
- Try
- R(E);
- Threat
- R(H)
- Vars
- S(e);N_GUARD::R1(E)
- P(h);N_SPINQ(g),OGATEB::QAB(G)
- Q(g);P_PINR(H)::S(B)
- S(d);N_GUARD,P_PINR(H)::QAB(G)
- S(d);N_GUARD,P_PINR(H)::QAB(G),XS(d)
- S(e);N_GUARD::R1(E),XS(e)
- Refutation
- S(d);P_PINR(H)
- Try
- R(H);CHECK
- Vars
- S(e);XR(H)::R1(E)
- Refutation
- K(f);N_SPINQ(g),P-FLIGHT
- Try
- Q(G);N_PINQ(g)
- Threat
- DUALS(3)
- Vars
- S(e);N_GUARD::R1(E),XS(e)
- S(e);N_GUARD::R1(E)
- Q(g);P_PINR(H)::QAB1(G)
- Q(g);::QAB1(G)
- S(d);P_PINR(H)::QAB1(G)
- Refutation
- Q(g);P_PINQ(G)
- Try
- Q(G);CHECK,XQ(g)
- Vars
- P(i);OGATE,P_SPINP(i)::QAR(G)
- Refutation
- P(i);XQ(G)
- Try
- Actual
- R(E);
- Threat
- R(H)
- Vars
- S(d);N_GUARD,P_PINR(H),XR(E)::QAB(G)
- S(d);OGATE,P_PINR(H)::QAB(G)
- S(e);N_GUARD::R1(E)
- P(h);N_SPINQ(g),OGATEB::QAB(G)
- Q(g);P_PINR(H)::S(B)
- S(d);N_GUARD,P_PINR(H)::QAB(G)
- S(d);N_GUARD,P_PINR(H)::QAB(G),XS(d)
- S(e);N_GUARD::R1(E),XS(e)
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).