MESON Chess Problem Database
Problem Display
PID: 276781 (Kn6/8/pkp1N3/1rN5/1P6/8/Q7/1R1q4 w - - 0 1)
Hjelle, David
Stella Polaris, 1971
#2
6 + 6
SOLUTION
- SOUND
- Sets
- 1...Qe2
- 2.Sa4#
- 1...Qf3
- 2.Sa4#
- 1...Qa4
- 2.Sxa4#
- 1...Qg4
- 2.Sa4#
- 1...Qh5
- 2.Sa4#
- 1...Qxb1
- 2.Sa4#
- 1...Qc1
- 2.Sa4#
- 1...Qe1
- 2.Sa4#
- 1...Qf1
- 2.Sa4#
- 1...Qg1
- 2.Sa4#
- 1...Qh1
- 2.Sa4#
- 1...Qd2
- 2.Sa4#
- 1...Qd3
- 2.Sa4#
- 1...Qd4
- 2.Sa4#
- 1...Qd5
- 2.Sa4#
- 1...Qd6
- 2.Sa4#
- 1...Qd7
- 2.Sa4#
- 1...Qd8
- 2.Sa4#
- 1...Rxb4
- 2.Rxb4#
- 1...Ra5
- 2.Qxa5#
- 2.bxa5#
- 1...Rxc5
- 2.bxc5#
- 1...Sd7
- 2.Qxa6#
- 1...a5
- 2.bxa5#
- 1...Qe2
- Tries
- 1.Rb3?
- threat
- 2.Sa4#
- 1...Rxb4
- 2.Rxb4#
- 1...Rxc5
- 2.bxc5#
- 1...Ra5
- 2.Qxa5#
- 2.bxa5#
- 1...a5
- 2.bxa5#
- 1...Qxb3!
- threat
- 1.Qh2?
- threat
- 2.Qc7#
- 2.Qxb8#
- 1...Rxc5
- 2.Qxb8#
- 1...Ra5
- 2.Qxb8#
- 1...Qd6
- 2.Sa4#
- 1...Qd7
- 2.Sa4#
- 1...Qd8
- 2.Sa4#
- 1...Sd7
- 2.Qc7#
- 1...Rxb4!
- threat
- 1.Rb3?
- Keys
- 1.Qd2!
- 1...Qxb1
- 2.Sa4#
- 2.Qd8#
- 1...Qxd2
- 2.Sa4#
- 1...Rxb4
- 2.Qxb4#
- 1...Rxc5
- 2.bxc5#
- 1...Ra5
- 2.bxa5#
- 1...Qc2
- 2.Qd8#
- 1...Qe2
- 2.Sa4#
- 2.Qd8#
- 1...Qb3
- 2.Qd8#
- 1...Qf3
- 2.Sa4#
- 2.Qd8#
- 1...Qa4
- 2.Sxa4#
- 2.Qd8#
- 1...Qg4
- 2.Sa4#
- 2.Qd8#
- 1...Qh5
- 2.Sa4#
- 2.Qd8#
- 1...Qc1
- 2.Sa4#
- 2.Qd8#
- 1...Qe1
- 2.Sa4#
- 2.Qd8#
- 1...Qf1
- 2.Sa4#
- 2.Qd8#
- 1...Qg1
- 2.Sa4#
- 2.Qd8#
- 1...Qh1
- 2.Sa4#
- 2.Qd8#
- 1...Sd7
- 2.Sxd7#
- 1...a5
- 2.bxa5#
- 1...Qxb1
- 1.Qd2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 17
- Sets
- Q(a);N_GUARD::S(D)
- Q(a);N_GUARD::S(D),XQ(a)
- Q(a);N_GUARD,XR(A)::S(D)
- R(b);OGATE,P_SPINR(b),XP(C)::R(A),XR(b)
- R(b);OGATE,XS(D)::R(A)+P(C)DCHECK,XR(b)
- S(f);N_GUARD::QAR1(B),XP(c)
- P(c);OGATE::P(C),XP(c)
- Tries
- Try
- R(A);
- Threat
- S(D)
- Vars
- R(b);OGATE,P_SPINR(b),XP(C)::R(A),XR(b)
- R(b);OGATE,XS(D)::R(A)+P(C)DCHECK,XR(b)
- P(c);OGATE::P(C),XP(c)
- Refutation
- Q(a);XR(A)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- R(b);XS(D)::QAR2(B),XS(f)
- R(b);::QAR2(B),XS(f)
- Q(a);N_GUARD::S(D)
- S(f);::QAB1(B)
- Refutation
- R(b);P_SPINR(b),XP(C)
- Try
- Actual
- Q(B);
- Vars
- Q(a);N_GUARD,XQ(B)::S(D)
- R(b);OGATE,P_SPINR(b),XP(C)::QAR2(B),XR(b)
- R(b);OGATE,XS(D)::R(A)+P(C)DCHECK,XR(b)
- R(b);OGATE::R(A)+P(C)DCHECK,XR(b)
- Q(a);N_GUARD::QAB(B)
- S(f);N_GUARD::S(D),XS(f)
- P(c);OGATE::P(C),XP(c)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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