MESON Chess Problem Database
Problem Display
PID: 263969 (4Q3/1q1rnp2/1P1kN1p1/2N4R/1p3P2/2R5/6B1/2K5 w - - 0 1)
Brummelman, Derk Hendrikus (AKA Bruma, DH)
3rd Prize, Tijdschrift vd KNSB, 1947
#2
9 + 7
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qxg2
- 2.Qxd7#
- 1...Qf3
- 2.Qxd7#
- 1...Qe4
- 2.Qxd7#
- 1...Qd5
- 2.Qxd7#
- 1...Qa6
- 2.Qxd7#
- 1...Qa8
- 2.Qxd7#
- 1...Qxb6
- 2.Qxd7#
- 1...Qb8
- 2.Qxd7#
- 1...Sd5
- 2.Se4#
- 1...Sc6
- 2.Se4#
- 2.Rd5#
- 1...Qxg2
- Tries
- 1.Se4+?
- 1...Kxe6
- 2.Re5#
- 1...Qxe4!
- 1...Kxe6
- 1.Sd4?
- threat
- 2.Sb5#
- 1...Qxg2
- 2.Qxd7#
- 1...Qxb6
- 2.Se4#
- 2.Qxd7#
- 1...Qf3
- 2.Qxd7#
- 1...Qe4
- 2.Sxe4#
- 2.Qxd7#
- 1...Qd5
- 2.Qxd7#
- 1...Qa6
- 2.Se4#
- 2.Qxd7#
- 1...Sd5
- 2.Se4#
- 2.Qe5#
- 1...Qc6!
- threat
- 1.Sd8?
- threat
- 2.Sxf7#
- 1...Qxg2
- 2.Qxd7#
- 1...Qxb6
- 2.Se4#
- 2.Qxd7#
- 1...Qf3
- 2.Qxd7#
- 1...Qe4
- 2.Sxe4#
- 2.Qxd7#
- 1...Qd5
- 2.Qxd7#
- 1...Sd5
- 2.Se4#
- 2.Qe5#
- 1...Sf5
- 2.Qe5#
- 1...Sc6
- 2.Se4#
- 2.Rd5#
- 1...Sc8
- 2.Qe5#
- 1...Sg8
- 2.Qe5#
- 1...f5
- 2.Sf7#
- 1...f6
- 2.Sf7#
- 1...Rxd8!
- threat
- 1.Rd3+?
- 1...Qd5
- 2.Qxd7#
- 1...Sd5!
- 1...Qd5
- 1.Rd5+?
- 1...Qxd5
- 2.Qxd7#
- 1...Sxd5
- 2.Se4#
- 1...Kc6!
- 1...Qxd5
- 1.Se4+?
- Keys
- 1.Sg5!
- threat
- 2.Sxf7#
- 1...Qxg2
- 2.Qxd7#
- 1...Qxb6
- 2.Qxd7#
- 1...Qf3
- 2.Qxd7#
- 1...Qe4
- 2.Qxd7#
- 1...Qd5
- 2.Qxd7#
- 1...Sd5
- 2.Sce4#
- 1...Sf5
- 2.Qe5#
- 1...Sc6
- 2.Sge4#
- 1...Sc8
- 2.Qe5#
- 1...Sg8
- 2.Qe5#
- 1...f5
- 2.Sf7#
- 1...f6
- 2.Sf7#
- threat
- 1.Sg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 3
- Sets
- Q(d);N_GUARD,XB(B)::QAR1(I),XR(e)
- Q(d);N_GUARD::QAR1(I),XR(e)
- Q(d);N_GUARD,XP(G)::QAR1(I),XR(e)
- S(f);S_CUTQ(d)::S(E)
- Tries
- Try
- S(E);CHECK
- Vars
- K(b);P-FLIGHT,P_SPINS(f),S_CUTQ(d),XS(H)::R1(F)
- Refutation
- Q(d);XS(E)
- Try
- S(H);
- Threat
- S(H)
- Vars
- Q(d);N_GUARD,XB(B)::QAR1(I),XR(e)
- Q(d);N_GUARD::QAR1(I),XR(e)
- Refutation
- Q(d);
- Try
- S(H);
- Threat
- S(H),XP(g)
- Vars
- Q(d);N_GUARD,XB(B)::QAR1(I),XR(e)
- Q(d);N_GUARD::QAR1(I),XR(e)
- S(f);OGATE::QAB1(I)
- P(g);::S(H)
- Refutation
- R(e);XS(H)
- Try
- R(C);CHECK
- Vars
- Q(d);P_SPINQ(d)::QAR1(I),XR(e)
- Refutation
- S(f);P_SPINS(f)
- Try
- R(F);CHECK
- Vars
- Q(d);XR(F)::QAR1(I),XR(e)
- S(f);SBLOCK,XR(F)::S(E)
- Refutation
- K(b);P-FLIGHT,P_SPINR(e)
- Try
- Actual
- S(H);
- Threat
- S(H),XP(g)
- Vars
- Q(d);N_GUARD,XB(B)::QAR1(I),XR(e)
- Q(d);N_GUARD,XP(G)::QAR1(I),XR(e)
- Q(d);N_GUARD::QAR1(I),XR(e)
- S(f);SBLOCK,S_CUTQ(d)::S(E)
- S(f);OGATE::QAB1(I)
- S(f);SBLOCK,S_CUTQ(d)::S(H)
- P(g);::S(H)
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).