MESON Chess Problem Database
Problem Display
PID: 232526 (7b/2K1R3/3N1B2/1bpk4/6r1/1R3n1B/6Qn/2qN4 w - - 0 1)
Groth, Reinhard
Freie Presse, 2002
#2
8 + 8
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qb2
- 2.Se3#
- 1...Qa3
- 2.Sc3#
- 2.Se3#
- 1...Qe3
- 2.Sxe3#
- 1...Qf4
- 2.Sc3#
- 1...Qg5
- 2.Sc3#
- 1...Qh6
- 2.Sc3#
- 1...Qa1
- 2.Se3#
- 1...Qb1
- 2.Sc3#
- 2.Se3#
- 1...Qc2
- 2.Se3#
- 1...Qc3
- 2.Sxc3#
- 1...Qc4
- 2.Se3#
- 1...Rxg2
- 2.Be6#
- 1...Rg3
- 2.Be6#
- 1...Ra4
- 2.Be6#
- 2.Qg8#
- 1...Rb4
- 2.Be6#
- 2.Qg8#
- 1...Rc4
- 2.Be6#
- 2.Qg8#
- 1...Rd4
- 2.Be6#
- 2.Re5#
- 2.Qg8#
- 1...Rf4
- 2.Be6#
- 2.Qg8#
- 1...Rh4
- 2.Be6#
- 2.Qg8#
- 1...Rg5
- 2.Be6#
- 1...Rg6
- 2.Be6#
- 1...Rg7
- 2.Be6#
- 1...Rg8
- 2.Be6#
- 2.Qxg8#
- 1...c4
- 2.Rxb5#
- 1...Qb2
- Tries
- 1.Bxg4?
- threat
- 2.Be6#
- 1...Sxg4
- 2.Qxf3#
- 1...c4
- 2.Rxb5#
- 1...Qe3
- 2.Sxe3#
- 1...Bd7
- 2.Rd3#
- 1...Bxf6!
- threat
- 1.Rd3+?
- 1...Rd4
- 2.Be6#
- 2.Re5#
- 2.Qg8#
- 1...Bxd3!
- 1...Rd4
- 1.Rxf3?
- threat
- 2.Rd3#
- 2.Rf5#
- 1...Rxg2
- 2.Be6#
- 2.Rf5#
- 1...Bxf6
- 2.Rd3#
- 1...c4
- 2.Rf5#
- 1...Qe3
- 2.Sxe3#
- 2.Rf5#
- 1...Qf4
- 2.Sc3#
- 2.Rd3#
- 1...Rd4
- 2.Be6#
- 2.Rf5#
- 2.Re5#
- 2.Qg8#
- 1...Re4
- 2.Rf5#
- 1...Rf4
- 2.Be6#
- 2.Rd3#
- 2.Qg8#
- 1...Bd3
- 2.Rxd3#
- 2.Rf5#
- 1...Sxf3!
- threat
- 1.Qxf3+?
- 1...Re4
- 2.Be6#
- 2.Qxe4#
- 1...Sxf3!
- 1...Re4
- 1.Qd2+?
- 1...Rd4
- 2.Se3#
- 2.Be6#
- 1...Bd3
- 2.Se3#
- 1...Sxd2
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 2.Re5#
- 1...Qxd2!
- 1...Rd4
- 1.Qxg4?
- threat
- 2.Qe6#
- 2.Qe4#
- 2.Qg8#
- 1...Bxf6
- 2.Qe4#
- 1...c4
- 2.Rxb5#
- 1...Qe3
- 2.Sxe3#
- 1...Qf4
- 2.Sc3#
- 2.Qe6#
- 2.Qg8#
- 1...Qg5
- 2.Sc3#
- 2.Qe6#
- 2.Qe4#
- 1...Qb1
- 2.Sc3#
- 2.Se3#
- 2.Qe6#
- 2.Qg8#
- 1...Qc2
- 2.Se3#
- 2.Qe6#
- 2.Qg8#
- 1...Qc4
- 2.Se3#
- 2.Qe6#
- 2.Qg8#
- 1...Bd3
- 2.Qe6#
- 2.Qg8#
- 1...Bd7
- 2.Qe4#
- 1...Be8
- 2.Qe6#
- 2.Qe4#
- 1...Bg7
- 2.Qe6#
- 2.Qe4#
- 1...Sd2
- 2.Se3#
- 2.Re5#
- 2.Qf5#
- 2.Qh5#
- 2.Qe6#
- 2.Qg5#
- 2.Qg8#
- 1...Sd4
- 2.Re5#
- 2.Qe4#
- 1...Se5
- 2.Rxe5#
- 2.Qe4#
- 1...Sg5
- 2.Re5#
- 2.Qf5#
- 1...Sxg4!
- threat
- 1.Bxg4?
- Keys
- 1.Qa2!
- threat
- 2.Rd3#
- 1...c4
- 2.Rxb5#
- 1...Qc3
- 2.Sxc3#
- 1...Qc4
- 2.Se3#
- 1...Rc4
- 2.Be6#
- 1...Rd4
- 2.Be6#
- 1...Bd3
- 2.Rxd3#
- 2.Qa8#
- 1...Bc4
- 2.Qa8#
- 1...Sd4
- 2.Re5#
- threat
- 1.Qa2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 12
- Sets
- Q(a);N_GUARD::S(A)
- Q(a);N_GUARD::S(A),XQ(a)
- Q(a);N_GUARD,P_PINS(E)::S(A)
- R(d);N_SPINS(c),OGATE,XQ(B)::B(D)
- R(d);OGATE::B(D)
- R(d);OGATE,P_PINR(H)::B(D)
- P(f);OGATEB::R(C),XB(e)
- Tries
- Try
- B(D);XR(d)
- Threat
- B(D)
- Vars
- S(b);N_GUARD,XB(D)::QAB(B),XS(c)
- P(f);OGATEB::R(C),XB(e)
- Q(a);N_GUARD::S(A),XQ(a)
- B(e);N_GUARD::R(C)
- Refutation
- B(h);XB(F)
- Try
- R(C);CHECK
- Refutation
- B(e);XR(C)
- Try
- R(C);XS(c)
- Threat
- DUALS(2)
- Vars
- B(h);XB(F)::QAB(B)+R(C),DCHECK
- P(f);::QAB(B)+R(C),DCHECK
- R(d);::R(C)
- Refutation
- S(b);P_SPINS(b),XR(C)
- Try
- Q(B);CHECK,XS(c)
- Refutation
- S(b);XQ(B)
- Try
- Q(B);CHECK,N_PINS(c)
- Vars
- B(e);P_SPINB(e)::S(A)
- S(c);XQ(B)::S(A)
- Refutation
- Q(a);XQ(B)
- Try
- Q(B);N_PINS(c),XR(d)
- Threat
- DUALS(3)
- Vars
- B(h);XB(F)::QAB1(B)
- P(f);OGATEB::R(C),XB(e)
- Q(a);N_GUARD::S(A),XQ(a)
- B(e);::QAB1(B)
- Refutation
- S(b);XQ(B)
- Try
- Actual
- Q(B);N_PINS(c)
- Threat
- QAB(B)+R(C),DCHECK
- Vars
- P(f);S_CUTQ(a),S_CUTR(d)::R(C),XB(e)
- Q(a);N_GUARD::S(A),XQ(a)
- Q(a);N_GUARD::S(A)
- R(d);OGATE::B(D)
- B(e);N_GUARD::QAB(B)
- S(c);N_GUARD,SBLOCK::R1(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).