MESON Chess Problem Database
Problem Display
PID: 138922 (4R3/5p2/2p2B2/2Rp4/1Pp1p3/3k4/2Np1p2/3QbK2 w - - 0 1)
Petite, Efren
Probleemblad, 1974
#2
7 + 9
| 5454 | Near Snap | 2014 |
SOLUTION
- SOUND
- Sets
- 1...c3
- 2.Rxc3#
- 1...e3
- 2.Rxe3#
- 1...c3
- Tries
- 1.Rxc4?
- threat
- 2.Rc3#
- 2.Qe2#
- 1...dxc4
- 2.Rd8#
- 1...d4
- 2.Qe2#
- 1...Kxc4!
- threat
- 1.Rxc6?
- 1...c3
- 2.Rxc3#
- 1...e3
- 2.Rxe3#
- 1...d4!
- 1...c3
- 1.Re7?
- 1...c3
- 2.Rxc3#
- 1...e3
- 2.Rxe3#
- 1...d4!
- 1...c3
- 1.b5?
- 1...cxb5
- 2.Rxd5#
- 1...c3
- 2.Rxc3#
- 1...e3
- 2.Sb4#
- 2.Rxe3#
- 1...d4!
- 1...cxb5
- 1.Rxc4?
- Keys
- 1.Sd4!
- 1...Kc3
- 2.Qb3#
- 1...Ke3
- 2.Qf3#
- 1...c3
- 2.Qe2#
- 1...e3
- 2.Qc2#
- 1...Kc3
- 1.Sd4!
Anticipated by 137020(1964)
This anticipates 103605(1983)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- P(e);OGATE::R1(E),XP(e)
- P(f);OGATE::R1(G),XP(f)
- Tries
- Try
- R(E);XP(e)
- Threat
- DUALS(2)
- Vars
- P(g);OGATEB,SBLOCK,XR(E)::R(G)
- P(g);::QAB1(A)
- Refutation
- K(d);N_SPINP(b),S_FLIGHT,XR(E)
- Try
- R(E);XP(h)
- Vars
- P(e);OGATE::R1(E),XP(e)
- P(f);OGATE::R1(G),XP(f)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- P(e);OGATE::R1(E),XP(e)
- P(f);OGATE::R1(G),XP(f)
- Refutation
- P(g);
- Try
- P(D);
- Vars
- P(h);N_GUARD,XP(D)::R(E),XP(g)
- P(e);OGATE::R1(E),XP(e)
- Refutation
- P(g);
- Try
- Actual
- S(C);
- Vars
- K(d);N_SPINP(b),P-FLIGHT,P_SPINP(e)::QAR1(A)
- K(d);N_SPINP(b),P-FLIGHT,P_SPINP(f)::QAR1(A)
- P(e);::QAB1(A)
- P(f);::QAB1(A)
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).