MESON Chess Problem Database
Problem Display
PID: 87690 (8/p2N4/Q1PRP3/3np1K1/2NrkBp1/2PnP1P1/3R4/3B4 w - - 0 1)
Nascimento, Raul C
The Problemist, 1993
#2
13 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rxc4
- 2.Qxc4#
- 1...Sc1
- 2.Sc5#
- 1...Se1
- 2.Sc5#
- 1...Sb2
- 2.Sc5#
- 1...Sf2
- 2.Sc5#
- 1...S3b4
- 2.Sc5#
- 1...S3xf4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...Sxc3
- 2.Sf6#
- 1...Sxe3
- 2.Sf6#
- 1...S5b4
- 2.Sf6#
- 1...S5xf4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Se7
- 2.Sf6#
- 1...Rxc4
- Tries
- 1.Be2?
- 1...Rxc4
- 2.Qxc4#
- 1...S3xf4
- 2.Sc5#
- 1...Sxc3
- 2.Sf6#
- 1...Sxe3
- 2.Sf6#
- 1...S5xf4
- 2.Sf6#
- 1...Sc1
- 2.Sc5#
- 1...Se1
- 2.Sc5#
- 1...Sb2
- 2.Sc5#
- 1...Sf2
- 2.Sc5#
- 1...S3b4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...S5b4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Se7
- 2.Sf6#
- 1...exf4!
- 1...Rxc4
- 1.Bxg4?
- 1...Rxc4
- 2.Qxc4#
- 1...S3xf4
- 2.Sc5#
- 1...Sxc3
- 2.Sf6#
- 1...Sxe3
- 2.Sf6#
- 1...S5xf4
- 2.Sf6#
- 1...Sc1
- 2.Sc5#
- 1...Se1
- 2.Sc5#
- 1...Sb2
- 2.Sc5#
- 1...Sf2
- 2.Sc5#
- 1...S3b4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...S5b4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Se7
- 2.Sf6#
- 1...exf4!
- 1...Rxc4
- 1.Bxe5?
- 1...Sxe5
- 2.Sc5#
- 2.Rxd4#
- 1...Sxc3
- 2.Sf6#
- 2.Rxd4#
- 1...Sxe3
- 2.Sf6#
- 2.Rxd4#
- 1...Sc1
- 2.Sc5#
- 2.Rxd4#
- 1...Se1
- 2.Sc5#
- 2.Rxd4#
- 1...Sb2
- 2.Sc5#
- 2.Rxd4#
- 1...Sf2
- 2.Sc5#
- 2.Rxd4#
- 1...S3b4
- 2.Sc5#
- 2.Rxd4#
- 1...S3f4
- 2.Sc5#
- 2.Rxd4#
- 1...Sc5
- 2.Sxc5#
- 2.Rxd4#
- 1...S5b4
- 2.Sf6#
- 2.Rxd4#
- 1...S5f4
- 2.Sf6#
- 2.Rxd4#
- 1...Sb6
- 2.Sf6#
- 2.Rxd4#
- 1...Sf6
- 2.Sxf6#
- 2.Rxd4#
- 1...Sc7
- 2.Sf6#
- 2.Rxd4#
- 1...Se7
- 2.Sf6#
- 2.Rxd4#
- 1...Rxc4!
- 1...Sxe5
- 1.Ra2?
- threat
- 2.Sd2#
- 1...Rxc4
- 2.Qxc4#
- 1...S3xf4
- 2.Sc5#
- 1...S5xf4
- 2.Sf6#
- 1...Sc1
- 2.Sc5#
- 1...Se1
- 2.Sc5#
- 1...Sb2
- 2.Sc5#
- 1...Sf2
- 2.Sc5#
- 1...S3b4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...exf4!
- threat
- 1.Rb2?
- threat
- 2.Sd2#
- 1...Rxc4
- 2.Qxc4#
- 1...Sxb2
- 2.Sc5#
- 1...S3xf4
- 2.Sc5#
- 1...S5xf4
- 2.Sf6#
- 1...Sc1
- 2.Sc5#
- 1...Se1
- 2.Sc5#
- 1...Sf2
- 2.Sc5#
- 1...S3b4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...exf4!
- threat
- 1.Rc2?
- threat
- 2.Sd2#
- 1...Rxc4
- 2.Qxc4#
- 1...S3xf4
- 2.Sc5#
- 1...S5xf4
- 2.Sf6#
- 1...Sc1
- 2.Sc5#
- 1...Se1
- 2.Sc5#
- 1...Sb2
- 2.Sc5#
- 1...Sf2
- 2.Sc5#
- 1...S3b4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...exf4!
- threat
- 1.Rf2?
- threat
- 2.Sd2#
- 1...Rxc4
- 2.Qxc4#
- 1...Sxf2
- 2.Sc5#
- 1...S3xf4
- 2.Sc5#
- 1...S5xf4
- 2.Sf6#
- 1...Sc1
- 2.Sc5#
- 1...Se1
- 2.Sc5#
- 1...Sb2
- 2.Sc5#
- 1...S3b4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...exf4!
- threat
- 1.Rg2?
- threat
- 2.Sd2#
- 1...Rxc4
- 2.Qxc4#
- 1...S3xf4
- 2.Sc5#
- 1...S5xf4
- 2.Sf6#
- 1...Sc1
- 2.Sc5#
- 1...Se1
- 2.Sc5#
- 1...Sb2
- 2.Sc5#
- 1...Sf2
- 2.Sc5#
- 1...S3b4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...exf4!
- threat
- 1.Rh2?
- threat
- 2.Sd2#
- 1...Rxc4
- 2.Qxc4#
- 1...S3xf4
- 2.Sc5#
- 1...S5xf4
- 2.Sf6#
- 1...Sc1
- 2.Sc5#
- 1...Se1
- 2.Sc5#
- 1...Sb2
- 2.Sc5#
- 1...Sf2
- 2.Sc5#
- 1...S3b4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...exf4!
- threat
- 1.Rxd3?
- threat
- 2.Sd2#
- 2.Sc5#
- 1...Rxd3
- 2.Sc5#
- 1...Rxc4
- 2.Qxc4#
- 1...Kxd3!
- threat
- 1.Qxa7?
- 1...S3xf4
- 2.Sc5#
- 1...Sxc3
- 2.Sf6#
- 1...Sxe3
- 2.Sf6#
- 1...S5xf4
- 2.Sf6#
- 1...exf4
- 2.Qxd4#
- 1...Sc1
- 2.Sc5#
- 1...Se1
- 2.Sc5#
- 1...Sb2
- 2.Sc5#
- 1...Sf2
- 2.Sc5#
- 1...S3b4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...S5b4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Se7
- 2.Sf6#
- 1...Rxc4!
- 1...S3xf4
- 1.c7?
- 1...Rxc4
- 2.Qxc4#
- 1...S3xf4
- 2.Sc5#
- 1...Sxc3
- 2.Sf6#
- 1...Sxe3
- 2.Sf6#
- 1...S5xf4
- 2.Sf6#
- 1...Sxc7
- 2.Sf6#
- 1...Sc1
- 2.Sc5#
- 1...Se1
- 2.Sc5#
- 1...Sb2
- 2.Sc5#
- 1...Sf2
- 2.Sc5#
- 1...S3b4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...S5b4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Se7
- 2.Sf6#
- 1...exf4!
- 1...Rxc4
- 1.e7?
- 1...Rxc4
- 2.Qxc4#
- 1...S3xf4
- 2.Sc5#
- 1...Sxc3
- 2.Sf6#
- 1...Sxe3
- 2.Sf6#
- 1...S5xf4
- 2.Sf6#
- 1...Sxe7
- 2.Sf6#
- 1...Sc1
- 2.Sc5#
- 1...Se1
- 2.Sc5#
- 1...Sb2
- 2.Sc5#
- 1...Sf2
- 2.Sc5#
- 1...S3b4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...S5b4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...exf4!
- 1...Rxc4
- 1.Be2?
- Keys
- 1.Sdxe5!
- 1...Rxc4
- 2.Qxc4#
- 1...S3xf4
- 2.Rxd4#
- 1...Sxe5
- 2.Rxd4#
- 1...Sxc3
- 2.Rxd4#
- 1...Sxe3
- 2.Rxd4#
- 1...S5xf4
- 2.Rxd4#
- 1...Sc1
- 2.Rxd4#
- 1...Se1
- 2.Rxd4#
- 1...Sb2
- 2.Rxd4#
- 1...Sf2
- 2.Rxd4#
- 1...S3b4
- 2.Rxd4#
- 1...Sc5
- 2.Rxd4#
- 1...S5b4
- 2.Rxd4#
- 1...Sb6
- 2.Rxd4#
- 1...Sf6
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...Se7
- 2.Rxd4#
- 1...Rxc4
- 1.Sdxe5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 15
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(b);OGATE,XS(F)::QAR2(I),XR(b)
- S(a);N_GUARD::S(M)
- S(a);N_GUARD,XB(G)::S(M)
- S(a);N_GUARD::S(M),XS(a)
- S(e);N_GUARD,XP(C)::S(M)
- S(e);N_GUARD,XP(D)::S(M)
- S(e);N_GUARD::S(M)
- S(e);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD::S(M),XS(e)
- Tries
- Try
- B(A);
- Vars
- R(b);OGATE,XS(F)::QAR2(I),XR(b)
- S(a);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD,XP(C)::S(M)
- S(e);N_GUARD,XP(D)::S(M)
- S(e);N_GUARD,XB(G)::S(M)
- S(a);N_GUARD::S(M)
- S(a);N_GUARD::S(M),XS(a)
- S(e);N_GUARD::S(M)
- S(e);N_GUARD::S(M),XS(e)
- Refutation
- P(f);XB(G)
- Try
- B(A);XP(d)
- Vars
- R(b);OGATE,XS(F)::QAR2(I),XR(b)
- S(a);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD,XP(C)::S(M)
- S(e);N_GUARD,XP(D)::S(M)
- S(e);N_GUARD,XB(G)::S(M)
- S(a);N_GUARD::S(M)
- S(a);N_GUARD::S(M),XS(a)
- S(e);N_GUARD::S(M)
- S(e);N_GUARD::S(M),XS(e)
- Refutation
- P(f);XB(G)
- Try
- B(G);XP(f)
- Refutation
- R(b);XS(F)
- Try
- R(B);
- Threat
- S(F)
- Vars
- R(b);OGATE,XS(F)::QAR2(I),XR(b)
- S(a);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD,XB(G)::S(M)
- S(a);N_GUARD::S(M)
- S(a);N_GUARD::S(M),XS(a)
- Refutation
- P(f);XB(G)
- Try
- R(B);
- Threat
- S(F)
- Vars
- R(b);OGATE,XS(F)::QAR2(I),XR(b)
- S(a);N_GUARD,XR(B)::S(M)
- S(a);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD,XB(G)::S(M)
- S(a);N_GUARD::S(M)
- S(a);N_GUARD::S(M),XS(a)
- Refutation
- P(f);XB(G)
- Try
- R(B);
- Threat
- S(F)
- Vars
- R(b);OGATE,XS(F)::QAR2(I),XR(b)
- S(a);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD,XB(G)::S(M)
- S(a);N_GUARD::S(M)
- S(a);N_GUARD::S(M),XS(a)
- Refutation
- P(f);XB(G)
- Try
- R(B);
- Threat
- S(F)
- Vars
- R(b);OGATE,XS(F)::QAR2(I),XR(b)
- S(a);N_GUARD,XR(B)::S(M)
- S(a);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD,XB(G)::S(M)
- S(a);N_GUARD::S(M)
- S(a);N_GUARD::S(M),XS(a)
- Refutation
- P(f);XB(G)
- Try
- R(B);
- Threat
- S(F)
- Vars
- R(b);OGATE,XS(F)::QAR2(I),XR(b)
- S(a);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD,XB(G)::S(M)
- S(a);N_GUARD::S(M)
- S(a);N_GUARD::S(M),XS(a)
- Refutation
- P(f);XB(G)
- Try
- R(B);
- Threat
- S(F)
- Vars
- R(b);OGATE,XS(F)::QAR2(I),XR(b)
- S(a);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD,XB(G)::S(M)
- S(a);N_GUARD::S(M)
- S(a);N_GUARD::S(M),XS(a)
- Refutation
- P(f);XB(G)
- Try
- R(B);XS(a)
- Threat
- DUALS(2)
- Vars
- R(b);XR(B)::S(M)
- R(b);OGATE,XS(F)::QAR2(I),XR(b)
- Refutation
- K(c);S_FLIGHT,XR(B)
- Try
- Q(I);XP(g)
- Vars
- S(a);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD,XP(C)::S(M)
- S(e);N_GUARD,XP(D)::S(M)
- S(e);N_GUARD,XB(G)::S(M)
- P(f);N_GUARD,XB(G)::QAR1(I),XR(b)
- S(a);N_GUARD::S(M)
- S(a);N_GUARD::S(M),XS(a)
- S(e);N_GUARD::S(M)
- S(e);N_GUARD::S(M),XS(e)
- Refutation
- R(b);XS(F)
- Try
- P(J);
- Vars
- R(b);OGATE,XS(F)::QAR2(I),XR(b)
- S(a);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD,XP(C)::S(M)
- S(e);N_GUARD,XP(D)::S(M)
- S(e);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD,XP(J)::S(M)
- S(a);N_GUARD::S(M)
- S(a);N_GUARD::S(M),XS(a)
- S(e);N_GUARD::S(M)
- S(e);N_GUARD::S(M),XS(e)
- Refutation
- P(f);XB(G)
- Try
- P(L);
- Vars
- R(b);OGATE,XS(F)::QAR2(I),XR(b)
- S(a);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD,XP(C)::S(M)
- S(e);N_GUARD,XP(D)::S(M)
- S(e);N_GUARD,XB(G)::S(M)
- S(e);N_GUARD,XP(L)::S(M)
- S(a);N_GUARD::S(M)
- S(a);N_GUARD::S(M),XS(a)
- S(e);N_GUARD::S(M)
- S(e);N_GUARD::S(M),XS(e)
- Refutation
- P(f);XB(G)
- Try
- Actual
- S(M);XP(f)
- Vars
- R(b);OGATE,XS(F)::QAR2(I),XR(b)
- S(a);OGATE,XB(G)::R1(B),XR(b)
- S(a);OGATE,XS(M)::R1(B),XR(b)
- S(e);OGATE,XP(C)::R1(K),XR(b)
- S(e);OGATE,XP(D)::R1(K),XR(b)
- S(e);OGATE,XB(G)::R1(K),XR(b)
- S(a);OGATE::R1(B),XR(b)
- S(e);OGATE::R1(K),XR(b)
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).