MESON Chess Problem Database
Problem Display
PID: 90752 (8/1Np1r3/1Q3B2/2nR3p/4kN1K/q4pP1/3P1p2/3n4 w - - 0 1)
Goldschmeding, Cornelis
Die Schwalbe, 1949
#2
8 + 9
| 6490 | yacpdb | 2009 |
| 5454 | Near Snap | 2015 |
SOLUTION
- SOUND
- Sets
- 1...Qb2
- 2.Sxc5#
- 1...Qb4
- 2.Qxb4#
- 1...Qa1
- 2.Sxc5#
- 1...Qa2
- 2.Sxc5#
- 1...Qb3
- 2.Sxc5#
- 1...Qd3
- 2.Sxc5#
- 1...Qa4
- 2.Sxc5#
- 1...Qa6
- 2.Sxc5#
- 1...Qa7
- 2.Sxc5#
- 2.Qb4#
- 1...Qa8
- 2.Sxc5#
- 2.Qb4#
- 1...Sb3
- 2.d3#
- 1...Sd3
- 2.Qd4#
- 1...Sa4
- 2.Qd4#
- 1...Sa6
- 2.Qd4#
- 1...Se6
- 2.Re5#
- 1...Sxb7
- 2.Qd4#
- 1...Sd7
- 2.Qd4#
- 1...cxb6
- 2.Sd6#
- 1...c6
- 2.Sd6#
- 1...Qb2
- Tries
- 1.Bxe7?
- threat
- 2.Qg6#
- 1...cxb6
- 2.Sd6#
- 1...Qa6
- 2.Sxc5#
- 1...Se6
- 2.Qxe6#
- 1...c6
- 2.Sd6#
- 1...Se3!
- threat
- 1.Qxc5?
- threat
- 2.Rd4#
- 2.Qd4#
- 2.Qc4#
- 1...Qxc5
- 2.Sxc5#
- 1...Re5
- 2.Rxe5#
- 1...f1Q
- 2.Rd4#
- 2.Qd4#
- 1...f1B
- 2.Rd4#
- 2.Qd4#
- 1...Qc1
- 2.Rd4#
- 2.Qd4#
- 2.Qxe7#
- 2.d3#
- 1...Qb2
- 2.d3#
- 1...Qb4
- 2.Qxb4#
- 2.Qc2#
- 2.d3#
- 1...Qa1
- 2.Qc2#
- 2.d3#
- 1...Qa2
- 2.Rd4#
- 2.Qd4#
- 2.Qxe7#
- 2.d3#
- 1...Qb3
- 2.Rd4#
- 2.Qd4#
- 2.Qxe7#
- 1...Qd3
- 2.Qxe7#
- 1...Qe3
- 2.Qxe7#
- 1...Qa4
- 2.Qxe7#
- 2.d3#
- 1...Qa6
- 2.Rd4#
- 2.Qd4#
- 1...Qa7
- 2.Rd4#
- 2.Qxe7#
- 2.Qc2#
- 2.d3#
- 1...Rd7
- 2.Re5#
- 2.Qd4#
- 2.Qc4#
- 1...Sb2
- 2.Rd4#
- 2.Qd4#
- 1...Se3
- 2.Rd4#
- 2.Qd4#
- 1...Qc3!
- threat
- 1.Qb1+?
- 1...Qd3
- 2.Sxc5#
- 1...Sd3!
- 1...Qd3
- 1.Bxe7?
- Keys
- 1.Qxc7!
- threat
- 2.Sd6#
- 1...Sxb7
- 2.Qc4#
- 1...Re6
- 2.Qh7#
- 1...Qa6
- 2.Sxc5#
- 1...Rd7
- 2.Qe5#
- 1...Sb3
- 2.Qc2#
- 1...Sd3
- 2.Qc4#
- 1...Sa4
- 2.Qc4#
- 1...Sa6
- 2.Qc4#
- 1...Se6
- 2.Qe5#
- 1...Sd7
- 2.Qc4#
- threat
- 1.Qxc7!
This anticipates 81191(1954)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 7
- ADDED MATES = 2
- REMOVED MATES = 9
- Sets
- Q(c);N_GUARD::S(H),XS(f)
- Q(c);N_GUARD::QAR(F),XQ(c)
- S(f);N_GUARD,S_CUTQ(c)::P(A)
- S(f);OGATE::QAR1(F)
- S(f);S_CUTR(i)::R1(E)
- S(f);OGATE,XS(H)::QAR1(F)
- P(h);N_GUARD,XQ(F)::S(H)
- P(h);N_GUARD::S(H)
- Tries
- Try
- B(G);XR(i)
- Threat
- QAB(F)
- Vars
- P(h);N_GUARD,XQ(F)::S(H)
- Q(c);N_GUARD::S(H),XS(f)
- S(f);N_GUARD::QAR2(F),XS(f)
- P(h);N_GUARD::S(H)
- Refutation
- S(a);
- Try
- Q(F);XS(f)
- Threat
- DUALS(3)
- Vars
- Q(c);XQ(F)::S(H),XQ(c)
- R(i);N_GUARD::R1(E),XR(i)
- Q(c);N_GUARD::P(A)
- Q(c);N_GUARD::QAR(F),XR(i)
- Refutation
- Q(c);
- Try
- Q(F);CHECK
- Vars
- Q(c);P_SPINQ(c)::S(H),XS(f)
- Refutation
- S(f);P_SPINS(f)
- Try
- Actual
- Q(F);XP(h)
- Threat
- S(H)
- Vars
- S(f);OGATE,XS(H)::QAR2(F)
- R(i);OGATE::QAB(F)
- Q(c);N_GUARD::S(H),XS(f)
- R(i);N_GUARD::QAR1(F)
- S(f);OGATE::QAB(F)
- S(f);OGATE::QAR2(F)
- S(f);S_CUTR(i)::QAR1(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).