MESON Chess Problem Database
Problem Display
PID: 232508 (4N1b1/B1rpK2P/1p1p1p2/R2pk3/2p2RP1/3n2P1/1qQ2p1n/8 w - - 0 1)
Groth, Reinhard
Freie Presse, 1986
#2
9 + 13
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.Qe2#
- 1...Qa3
- 2.Qe2#
- 1...Qc3
- 2.Qe2#
- 2.Qxc3#
- 1...Qb1
- 2.Qe2#
- 2.Qc3#
- 1...Qa2
- 2.Qc3#
- 1...Qb3
- 2.Qe2#
- 1...Qb4
- 2.Qe2#
- 1...Qb5
- 2.Qe2#
- 1...Sc1
- 2.Re4#
- 2.Qe4#
- 2.Qf5#
- 1...Se1
- 2.Re4#
- 2.Qe4#
- 2.Qf5#
- 1...Sb4
- 2.Re4#
- 2.Qe4#
- 2.Qf5#
- 1...Sc5
- 2.Qf5#
- 1...f5
- 2.h8Q#
- 2.h8B#
- 1...Qa1
- Tries
- 1.Sxd6?
- threat
- 2.Re4#
- 1...Bxh7
- 2.Sf7#
- 1...Sxf4
- 2.Qe4#
- 1...bxa5
- 2.Rf5#
- 1...Qd4
- 2.Rf5#
- 1...Qb5
- 2.Qe2#
- 1...Sc5
- 2.Qf5#
- 1...b5
- 2.Rf5#
- 1...f5
- 2.h8Q#
- 2.h8B#
- 1...Rc5!
- threat
- 1.Qxd3?
- threat
- 2.Re4#
- 2.Rf5#
- 2.Qe4#
- 2.Qf5#
- 2.Qe3#
- 1...Bxh7
- 2.Rxd5#
- 2.Qxd5#
- 1...Sxg4
- 2.Rf5#
- 2.Qe4#
- 2.Qf5#
- 1...bxa5
- 2.Rf5#
- 2.Qf5#
- 2.Qe3#
- 1...f1Q
- 2.Re4#
- 2.Qe4#
- 2.Qf5#
- 2.Qe3#
- 1...f1S
- 2.Re4#
- 2.Rf5#
- 2.Qe4#
- 2.Qf5#
- 1...f1R
- 2.Re4#
- 2.Qe4#
- 2.Qf5#
- 2.Qe3#
- 1...Qc1
- 2.Re4#
- 2.Rf5#
- 2.Qe4#
- 2.Qf5#
- 2.Qd4#
- 1...Qa3
- 2.Re4#
- 2.Rf5#
- 2.Qe4#
- 2.Qf5#
- 2.Qd4#
- 1...Qc3
- 2.Re4#
- 2.Rf5#
- 2.Qe4#
- 2.Qf5#
- 2.Qxc3#
- 1...Qd4
- 2.Rf5#
- 2.Qf5#
- 2.Qxd4#
- 1...Qb1
- 2.Re4#
- 2.Rf5#
- 2.Qc3#
- 2.Qd4#
- 1...Qc2
- 2.Re4#
- 2.Rf5#
- 2.Qd4#
- 1...Qd2
- 2.Re4#
- 2.Rf5#
- 2.Qe4#
- 2.Qf5#
- 1...Qe2
- 2.Rf5#
- 2.Qxe2#
- 2.Qf5#
- 2.Qc3#
- 2.Qd4#
- 1...Qb3
- 2.Re4#
- 2.Rf5#
- 2.Qe4#
- 2.Qf5#
- 2.Qd4#
- 1...Qb5
- 2.Rf5#
- 2.Qe2#
- 2.Qf5#
- 2.Qe3#
- 2.Qd4#
- 1...Rc5
- 2.Rf5#
- 2.Qf5#
- 2.Qe3#
- 1...Be6
- 2.Re4#
- 2.Qe4#
- 2.Qe3#
- 1...Sf1
- 2.Re4#
- 2.Rf5#
- 2.Qe4#
- 2.Qf5#
- 1...b5
- 2.Rf5#
- 2.Qf5#
- 2.Qe3#
- 1...f5
- 2.Rxf5#
- 2.Qxf5#
- 2.Qe3#
- 2.h8Q#
- 2.h8B#
- 1...cxd3!
- threat
- 1.Qxb2+?
- 1...c3
- 2.Qe2#
- 1...Sxb2!
- 1...c3
- 1.Qxc4?
- threat
- 2.Re4#
- 2.Rf5#
- 2.Qe4#
- 1...Bxh7
- 2.Rxd5#
- 2.Qxd5#
- 1...Sxg4
- 2.Qe4#
- 1...Sxf4
- 2.Qxf4#
- 2.gxf4#
- 1...bxa5
- 2.Rf5#
- 1...f1Q
- 2.Re4#
- 2.Qe4#
- 1...f1R
- 2.Re4#
- 2.Qe4#
- 1...Qd4
- 2.Qxd4#
- 1...Qe2
- 2.Rf5#
- 2.Qd4#
- 1...Qb4
- 2.Re4#
- 2.Rf5#
- 1...Qb5
- 2.Rf5#
- 2.Qd4#
- 1...Rc5
- 2.Rf5#
- 1...Be6
- 2.Re4#
- 2.Qe4#
- 1...Sc5
- 2.Rf5#
- 1...b5
- 2.Rf5#
- 1...f5
- 2.Rxf5#
- 2.h8Q#
- 2.h8B#
- 1...Rxc4!
- threat
- 1.h8S?
- threat
- 2.Sg6#
- 1...Bf7
- 2.Sxf7#
- 1...Bh7
- 2.Sf7#
- 1...Sxf4!
- threat
- 1.Sxd6?
- Keys
- 1.Sxf6!
- threat
- 2.Re4#
- 1...Bxh7
- 2.Rxd5#
- 1...Sxg4
- 2.Sxg4#
- 1...Sxf4
- 2.Qe4#
- 1...bxa5
- 2.Rf5#
- 1...Qd4
- 2.Rf5#
- 1...Qb5
- 2.Qe2#
- 1...Rc5
- 2.Sxd7#
- 1...Sc5
- 2.Qf5#
- 1...b5
- 2.Rf5#
- threat
- 1.Sxf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 5
- Sets
- Q(a);N_GUARD::QAR(A)
- Q(a);N_GUARD::QAB(A)
- Q(a);N_GUARD,N_SPINP(f)::QAR(A)
- S(d);N_SPINP(f),OGATE::QAR1(A)
- P(j);::P=Q
- Tries
- Try
- S(I);XP(i)
- Threat
- R1(C)
- Vars
- B(m);N_GUARD,XP(H)::S(I)
- S(d);OGATE,XR(C)::QAR1(A)
- P(h);N_SPINP(f),XR(E)::R1(C)
- Q(a);SBLOCK::R1(C)
- Q(a);N_GUARD,N_SPINP(f)::QAR(A)
- S(d);N_SPINP(f),OGATE::QAR1(A)
- P(h);N_SPINP(f)::R1(C)
- P(j);::P=Q
- Refutation
- R(k);N_SPINP(f)
- Try
- Q(A);XS(d)
- Threat
- DUALS(5)
- Refutation
- P(e);XQ(A)
- Try
- Q(A);CHECK,XQ(a)
- Vars
- P(e);N_SPINP(f),P_SPINP(e)::QAR(A)
- Refutation
- S(d);XQ(A)
- Try
- Q(A);XP(e)
- Threat
- DUALS(3)
- Vars
- S(c);XP(D)::QAR1(A)
- P(h);N_SPINP(f),XR(E)::R1(C)
- Q(a);N_GUARD::QAB1(A),XQ(a)
- R(k);N_SPINP(f)::R1(C)
- S(d);N_SPINP(f)::R1(C)
- P(h);N_SPINP(f)::R1(C)
- Refutation
- R(k);XQ(A)
- Try
- P(H);
- Threat
- S(H)
- Vars
- B(m);N_GUARD::S(H),XB(m)
- B(m);N_GUARD::S(H)
- Refutation
- S(d);XR(C)
- Try
- Actual
- S(I);XP(j)
- Threat
- R1(C)
- Vars
- B(m);N_GUARD,XP(H)::R1(E),XP(f)
- S(c);XP(D)::S(I),XS(c)
- S(d);OGATE,XR(C)::QAR1(A)
- P(h);N_SPINP(f),XR(E)::R1(C)
- Q(a);SBLOCK::R1(C)
- Q(a);N_GUARD,N_SPINP(f)::QAR(A)
- R(k);N_GUARD,N_SPINP(f)::S(I),XP(l)
- S(d);N_SPINP(f),OGATE::QAR1(A)
- P(h);N_SPINP(f)::R1(C)
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).