MESON Chess Problem Database
Problem Display
PID: 74859 (8/6n1/1N6/1RP5/3k3N/1r1p4/QPpn4/2K1R3 w - - 0 1)
Strydom, Jan
The Observer, 0000
#2
8 + 6
| 136 | Problem Observer | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Rxb2
- 2.Qxb2#
- 1...Ra3
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Rb4
- 2.Qd5#
- 1...Rxb5
- 2.Qd5#
- 1...Sb1
- 2.Sf3#
- 1...Sf1
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sc4
- 2.Sf3#
- 1...Se4
- 2.Sf3#
- 1...Sf5
- 2.Sxf5#
- 1...Sh5
- 2.Sf5#
- 1...Se6
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...Rxb2
- Tries
- 1.Re2?
- 1...Rxb2
- 2.Qxb2#
- 1...Rxb5
- 2.Qd5#
- 1...Se4
- 2.Sf3#
- 1...Sb1
- 2.Sf3#
- 1...Ra3
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Rb4
- 2.Qd5#
- 1...Sf1
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sc4
- 2.Sf3#
- 1...Sf5
- 2.Sxf5#
- 1...Sh5
- 2.Sf5#
- 1...Se6
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...dxe2!
- 1...Rxb2
- 1.Rb4+?
- 1...Rxb4
- 2.Qd5#
- 1...Sc4
- 2.Rxc4#
- 1...Kxc5!
- 1...Rxb4
- 1.Ra5?
- 1...Rxb2
- 2.Qxb2#
- 1...Rb5
- 2.Qd5#
- 1...Se4
- 2.Sf3#
- 1...Sb1
- 2.Sf3#
- 1...Ra3
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Rb4
- 2.Qd5#
- 1...Sf1
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sc4
- 2.Sf3#
- 1...Sf5
- 2.Sxf5#
- 1...Sh5
- 2.Sf5#
- 1...Se6
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...Rxb6!
- 1...Rxb2
- 1.Qxb3?
- threat
- 2.Qd5#
- 2.Qc3#
- 1...Se4
- 2.Sf3#
- 2.Qd5#
- 1...Sb1
- 2.Sf3#
- 2.Qa4#
- 2.Qc4#
- 2.Qd5#
- 2.Qb4#
- 1...Sc4
- 2.Sf3#
- 2.Qxc4#
- 2.Qc3#
- 1...Sxb3+!
- threat
- 1.Qa3?
- 1...Rxb2
- 2.Qxb2#
- 1...Rxb5
- 2.Qc3#
- 1...Se4
- 2.Sf3#
- 1...Sb1
- 2.Sf3#
- 1...Rc3
- 2.Qxc3#
- 2.bxc3#
- 1...Rb4
- 2.Qc3#
- 1...Sf1
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sc4
- 2.Sf3#
- 1...Sf5
- 2.Sxf5#
- 1...Sh5
- 2.Sf5#
- 1...Se6
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...Rxa3!
- 1...Rxb2
- 1.Qa4+?
- 1...Sc4
- 2.Sf3#
- 2.Qxc4#
- 1...Rb4!
- 1...Sc4
- 1.Qa7?
- threat
- 2.Qd7#
- 2.Qxg7#
- 1...Rxb2
- 2.Qxg7#
- 1...Se4
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 2.Qd7#
- 1...Sc4
- 2.Sf3#
- 1...Sf5
- 2.Sxf5#
- 1...Sh5
- 2.Sf5#
- 2.Qd7#
- 1...Se6
- 2.Sf5#
- 2.Qd7#
- 1...Se8
- 2.Sf5#
- 1...Rxb5!
- threat
- 1.Qa8?
- threat
- 2.Qd5#
- 2.Qd8#
- 1...Rxb5
- 2.Qd5#
- 1...Se4
- 2.Sf3#
- 2.Rxe4#
- 2.Qxe4#
- 2.Qd5#
- 1...Sc4
- 2.Sf3#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 1...Sf5
- 2.Sxf5#
- 2.Qd5#
- 1...Se6
- 2.Sf5#
- 2.Qd5#
- 1...Se8
- 2.Sf5#
- 2.Qd5#
- 1...Rxb2!
- threat
- 1.c6?
- threat
- 2.Rd5#
- 1...Rxb2
- 2.Qxb2#
- 1...Rxb5!
- threat
- 1.Re2?
- Keys
- 1.Qa1!
- 1...Rxb2
- 2.Qxb2#
- 1...Rxb5
- 2.b4#
- 1...Se4
- 2.Sf3#
- 1...Sb1
- 2.Sf3#
- 1...Ra3
- 2.bxa3#
- 1...Rc3
- 2.bxc3#
- 1...Rb4
- 2.b3#
- 1...Sf1
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sc4
- 2.Sf3#
- 1...Sf5
- 2.Sxf5#
- 1...Sh5
- 2.Sf5#
- 1...Se6
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...Rxb2
- 1.Qa1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(c);OGATE,XP(D)::QAB(C),XR(c)
- R(c);OGATE::QAR1(C)
- R(c);OGATE,XR(F)::QAR1(C)
- S(b);N_GUARD::S(E)
- S(b);N_GUARD::S(E),XS(b)
- S(f);N_GUARD::S(E),XS(f)
- S(f);N_GUARD::S(E)
- Tries
- Try
- R(B);
- Vars
- R(c);OGATE,XP(D)::QAB(C),XR(c)
- R(c);OGATE,XR(F)::QAR1(C)
- S(b);N_GUARD::S(E)
- R(c);OGATE::QAR1(C)
- S(b);N_GUARD::S(E),XS(b)
- S(f);N_GUARD::S(E),XS(f)
- S(f);N_GUARD::S(E)
- Refutation
- P(d);XR(B)
- Try
- R(F);CHECK
- Vars
- R(c);OGATE,XR(F)::QAR1(C)
- S(b);N_GUARD,P_SPINS(b)::R1(F),XS(b)
- Refutation
- K(e);S_FLIGHT,XP(G)
- Try
- R(F);
- Vars
- R(c);OGATE,XP(D)::QAB(C),XR(c)
- R(c);OGATE::QAR1(C)
- S(b);N_GUARD::S(E)
- S(b);N_GUARD::S(E),XS(b)
- S(f);N_GUARD::S(E),XS(f)
- S(f);N_GUARD::S(E)
- Refutation
- R(c);XS(H)
- Try
- Q(C);XR(c)
- Threat
- DUALS(2)
- Refutation
- S(b);CHECK,XQ(C)
- Try
- Q(C);
- Vars
- R(c);OGATE,XP(D)::QAB(C),XR(c)
- R(c);OGATE,XR(F)::QAB1(C)
- S(b);N_GUARD::S(E)
- R(c);OGATE::QAB1(C)
- S(b);N_GUARD::S(E),XS(b)
- S(f);N_GUARD::S(E),XS(f)
- S(f);N_GUARD::S(E)
- Refutation
- R(c);XQ(C)
- Try
- Q(C);CHECK
- Refutation
- R(c);P_SPINR(c)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- R(c);XP(D)::QAB(C),XS(f)
- S(b);N_GUARD::S(E)
- S(f);N_GUARD::S(E),XS(f)
- S(f);N_GUARD::S(E)
- Refutation
- R(c);XR(F)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- R(c);XR(F)::QAR1(C)
- Refutation
- R(c);XP(D)
- Try
- P(G);
- Threat
- R1(F)
- Vars
- R(c);OGATE,XP(D)::QAB(C),XR(c)
- Refutation
- R(c);XR(F)
- Try
- Actual
- Q(C);
- Vars
- R(c);OGATE,P_SPINR(c),XP(D)::QAB(C),XR(c)
- R(c);OGATE,XR(F)::QAB(C)+P(D)
- S(b);N_GUARD::S(E)
- R(c);OGATE::QAB(C)+P(D),XR(c)
- R(c);OGATE::P(D),XR(c)
- R(c);OGATE::QAB(C)+P(D)
- S(b);N_GUARD::S(E),XS(b)
- S(f);N_GUARD::S(E),XS(f)
- S(f);N_GUARD::S(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).