MESON Chess Problem Database
Problem Display
PID: 261632 (4RK2/2RB2B1/b6Q/1p1p1pp1/8/r2k1r1n/2p1p3/3q1N2 w - - 0 1)
Szerencsics, Alois
6th Place, Schweizerische Schachzeitung, 1977
#2
7 + 12
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Rc3#
- 1...Ra2
- 2.Rc3#
- 1...Rc3
- 2.Rxc3#
- 1...Ra4
- 2.Rc3#
- 1...Ra5
- 2.Rc3#
- 1...Rf2
- 2.Re3#
- 1...Re3
- 2.Rxe3#
- 1...Rg3
- 2.Bxf5#
- 1...Rf4
- 2.Re3#
- 1...Bb7
- 2.Bxb5#
- 1...Bc8
- 2.Bxb5#
- 1...Sf4
- 2.Bxf5#
- 1...f4
- 2.Bf5#
- 2.Qg6#
- 2.Qh7#
- 1...Ra1
- Tries
- 1.Qb6?
- threat
- 2.Qd4#
- 1...Ra4
- 2.Rc3#
- 1...Rf4
- 2.Re3#
- 2.Qe3#
- 1...d4
- 2.Qxd4#
- 1...Qa1!
- threat
- 1.Qd6?
- threat
- 2.Qxa3#
- 2.Qxd5#
- 1...Qxf1
- 2.Qxd5#
- 1...Rxf1
- 2.Qxd5#
- 1...exf1Q
- 2.Qxd5#
- 1...exf1S
- 2.Qxd5#
- 1...exf1B
- 2.Qxd5#
- 1...exf1R
- 2.Qxd5#
- 1...c1Q
- 2.Qxd5#
- 1...c1S
- 2.Qxd5#
- 1...c1B
- 2.Qxd5#
- 1...c1R
- 2.Qxd5#
- 1...e1Q
- 2.Qxd5#
- 1...e1B
- 2.Qxd5#
- 1...Qb1
- 2.Qxd5#
- 1...Qc1
- 2.Qxd5#
- 1...Qe1
- 2.Qxd5#
- 1...Qd2
- 2.Qxd5#
- 1...Ra1
- 2.Rc3#
- 2.Qxd5#
- 1...Ra2
- 2.Rc3#
- 2.Qxd5#
- 1...Rb3
- 2.Qxd5#
- 1...Rc3
- 2.Rxc3#
- 2.Qxd5#
- 1...Ra4
- 2.Rc3#
- 1...Ra5
- 2.Rc3#
- 2.Qxd5#
- 1...Rf4
- 2.Re3#
- 2.Qxa3#
- 1...Bb7
- 2.Bxb5#
- 2.Qxa3#
- 1...Sf4
- 2.Bxf5#
- 2.Qxa3#
- 1...b4
- 2.Qxd5#
- 1...d4
- 2.Qxa3#
- 2.Qxd4#
- 1...Qa1!
- threat
- 1.Qe6?
- threat
- 2.Qxd5#
- 1...Qa1
- 2.Qxe2#
- 1...Ra4
- 2.Rc3#
- 1...Rf4
- 2.Qe3#
- 1...Bb7
- 2.Bxb5#
- 1...Sf4
- 2.Qxf5#
- 1...d4!
- threat
- 1.Qf6?
- threat
- 2.Qd4#
- 1...Ra4
- 2.Rc3#
- 2.Qc3#
- 1...Rf4
- 2.Re3#
- 1...d4
- 2.Qxd4#
- 1...Qa1!
- threat
- 1.Qb6?
- Keys
- 1.Qc6!
- threat
- 2.Qxd5#
- 1...Qa1
- 2.Qxc2#
- 1...Ra4
- 2.Qc3#
- 1...Rf4
- 2.Re3#
- 1...Bb7
- 2.Qxb5#
- 1...Sf4
- 2.Bxf5#
- 1...d4
- 2.Qxf3#
- threat
- 1.Qc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 8
- Sets
- R(d);N_GUARD::R1(C)
- R(d);N_GUARD::R1(C),XR(d)
- R(f);N_GUARD::R1(F)
- R(f);N_GUARD::R1(F),XR(f)
- R(f);N_GUARD::B(D),XP(j)
- B(l);N_GUARD::B(D),XP(h)
- S(g);S_CUTR(f)::B(D),XP(j)
- Tries
- Try
- Q(B);
- Threat
- QAR1(B)
- Vars
- R(d);N_GUARD::R1(C)
- P(i);::QAR1(B),XP(i)
- Refutation
- Q(a);
- Try
- Q(B);P_PINP(i)
- Threat
- DUALS(2)
- Vars
- Q(a);XS(A)::QAR2(B),XP(i)
- R(f);XS(A)::QAR2(B),XP(i)
- P(c);XS(A)::QAR2(B),XP(i)
- P(b);::QAR2(B),XP(i)
- P(c);::QAR2(B),XP(i)
- Q(a);::QAR2(B),XP(i)
- R(d);::QAR2(B),XP(i)
- R(d);N_GUARD::R1(C)
- P(h);::QAR2(B),XP(i)
- Refutation
- Q(a);
- Try
- Q(B);
- Threat
- QAR2(B),XP(i)
- Vars
- Q(a);N_GUARD::QAB1(B),XP(c)
- R(d);N_GUARD::R1(C)
- R(f);N_GUARD::QAR1(B)
- B(l);N_GUARD::B(D),XP(h)
- S(g);S_CUTR(f)::QAB(B),XP(j)
- Refutation
- P(i);
- Try
- Q(B);
- Threat
- QAR1(B)
- Vars
- R(f);N_GUARD::R1(F)
- P(i);::QAR1(B),XP(i)
- Refutation
- Q(a);
- Try
- Actual
- Q(B);
- Threat
- QAR2(B),XP(i)
- Vars
- Q(a);N_GUARD::QAB1(B),XP(b)
- R(d);N_GUARD::QAR1(B)
- R(f);N_GUARD::R1(F)
- B(l);N_GUARD::QAB(B),XP(h)
- S(g);S_CUTR(f)::B(D),XP(j)
- P(i);OGATE::QAR2(B),XR(f)
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).