MESON Chess Problem Database
Problem Display
PID: 41546 (8/5p2/1K3p1b/p1Pp1R1n/3kN3/1R1p3q/1Nr2PB1/3rQ1B1 w - - 0 1)
Casa, Alex
4th Prize, The Problemist, 1969
#2
10 + 11
| 3751 | FIDE Album (1968-1970) | 1977 |
| 4393 | Uralski Problemist | 2004 |
SOLUTION
- SOUND
- Sets
- 1...Rxb2
- 2.Qc3#
- 1...Re2
- 2.Qc3#
- 1...Rc3
- 2.Qxc3#
- 1...dxe4
- 2.Qxe4#
- 1...Rxb2
- Tries
- 1.Sd2?
- threat
- 2.Rxd5#
- 1...Qxg2
- 2.Rxd3#
- 1...Qxf5
- 2.f4#
- 1...Qf3
- 2.Sxf3#
- 1...Sf4
- 2.f3#
- 1...Rxc5!
- threat
- 1.Sc3?
- threat
- 2.Sb5#
- 2.Rxd5#
- 1...Qxg2
- 2.Sb5#
- 1...Qxf5
- 2.Sb5#
- 1...Rxc3
- 2.Rxd5#
- 2.Qxc3#
- 1...Qf3
- 2.Sb5#
- 1...Sf4
- 2.Sb5#
- 1...Rxb2!
- threat
- 1.Sg3?
- threat
- 2.Rxd5#
- 1...Qxf5
- 2.Sxf5#
- 1...Rxb2
- 2.Qc3#
- 1...Rxc5
- 2.f4#
- 1...Sf4
- 2.Qe3#
- 1...Qxg2!
- threat
- 1.Sd6?
- threat
- 2.Sb5#
- 2.Rxd5#
- 1...Qxg2
- 2.Sb5#
- 1...Qxf5
- 2.Sb5#
- 2.Sxf5#
- 1...Rxb2
- 2.Rxd5#
- 2.Qc3#
- 1...Qf3
- 2.Sb5#
- 1...Sf4
- 2.Sb5#
- 1...Rxc5!
- threat
- 1.Sxf6?
- threat
- 2.Rxd5#
- 2.Qe5#
- 1...Qxg2
- 2.Qe5#
- 1...Rxe1
- 2.Rxd5#
- 1...Rxb2
- 2.Qc3#
- 1...Rxc5
- 2.Qe5#
- 1...Sxf6
- 2.Qe5#
- 1...Qh2
- 2.Rxd5#
- 1...Qe3
- 2.Rxd5#
- 1...Qf3
- 2.Qe5#
- 1...Qg3
- 2.Rxd5#
- 1...Re2
- 2.Rxd5#
- 2.Qc3#
- 1...Be3
- 2.Rxd5#
- 1...Bf4
- 2.Rxd5#
- 1...Sf4
- 2.Qe5#
- 1...Qxf5!
- threat
- 1.Rb4+?
- 1...Rc4
- 2.Qc3#
- 1...axb4!
- 1...Rc4
- 1.f3+?
- 1...Be3
- 2.Bxe3#
- 2.Qxe3#
- 1...Rf2!
- 1...Be3
- 1.f4+?
- 1...Qe3
- 2.Bxe3#
- 2.Qxe3#
- 1...Rf2!
- 1...Qe3
- 1.Sd2?
- Keys
- 1.Sg5!
- threat
- 2.Rxd5#
- 1...Qxg2
- 2.Qe3#
- 1...Qxf5
- 2.Qe3#
- 1...Rxb2
- 2.Qc3#
- 1...Rxc5
- 2.f3#
- 1...Qf3
- 2.Sxf3#
- 1...Sf4
- 2.Rxf4#
- threat
- 1.Sg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 3
- Sets
- R(b);N_GUARD,P_PINR(F),XS(C)::QAB1(A)
- R(b);N_GUARD::QAB1(A)
- R(b);N_GUARD::QAB1(A),XR(b)
- P(g);OGATE,XS(G)::QAR1(A),XP(g)
- Tries
- Try
- S(G);
- Threat
- R1(I),XP(g)
- Vars
- Q(d);N_GUARD,XB(E)::R1(F),XP(c)
- Q(d);N_GUARD,XR(I)::B(B)+P(D)
- Q(d);N_GUARD::S(G),XQ(d)
- S(h);S_CUTB(j)::B(B)+P(D)
- Refutation
- R(b);XP(H)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(d);XB(E)::S(G)
- Q(d);XR(I)::S(G)
- Q(d);::S(G)
- S(h);::S(G)
- Refutation
- R(b);P_PINR(F),XS(C)
- Try
- S(G);
- Threat
- R1(I),XP(g)
- Vars
- Q(d);XR(I)::S(G),XQ(d)
- R(b);N_GUARD,P_PINR(F),XS(C)::QAB1(A)
- R(b);N_GUARD,XP(H)::B(B)+P(D)
- S(h);S_CUTB(j)::QAB1(A)
- Refutation
- Q(d);XB(E)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(d);XB(E)::S(G)
- Q(d);::S(G)
- S(h);::S(G)
- Refutation
- R(b);XP(H)
- Try
- S(G);XP(i)
- Threat
- DUALS(2)
- Vars
- Q(d);XB(E)::QAB1(A)
- R(a);XQ(A)::R1(I),XP(g)
- R(b);N_GUARD,P_PINR(F),XS(C)::QAB1(A)
- R(b);XP(H)::QAB1(A)
- S(h);XS(G)::QAB1(A)
- Q(d);::R1(I),XP(g)
- Q(d);::QAB1(A)
- B(j);::R1(I),XP(g)
- S(h);::QAB1(A)
- Refutation
- Q(d);XR(I)
- Try
- R(F);CHECK
- Vars
- R(b);P_SPINR(b)::QAB1(A)
- Refutation
- P(f);XR(F)
- Try
- P(D);CHECK
- Refutation
- R(b);P_SPINR(b)
- Try
- P(D);CHECK
- Refutation
- R(b);P_SPINR(b)
- Try
- Actual
- S(G);
- Threat
- R1(I),XP(g)
- Vars
- Q(d);N_GUARD,XB(E)::QAB1(A)
- Q(d);N_GUARD,XR(I)::QAB1(A)
- R(b);N_GUARD,P_PINR(F),XS(C)::QAB1(A)
- R(b);N_GUARD,XP(H)::B(B)+P(D)
- Q(d);N_GUARD::S(G),XQ(d)
- S(h);N_GUARD::R(I),XS(h)
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).