MESON Chess Problem Database
Problem Display
PID: 261335 (2QnNb2/1q5b/2N2R2/3n2B1/r3kP2/r7/2P2PP1/1B1R2K1 w - - 0 1)
Sprecher, Andreas
Neue Zurcher Zeitung, 1987
#2
12 + 8
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qxc6
- 2.c3#
- 1...Qa8
- 2.c3#
- 1...Qxc8
- 2.c3#
- 1...Qb3
- 2.cxb3#
- 1...Qa7
- 2.c3#
- 1...Qc7
- 2.c3#
- 1...Qd7
- 2.c3#
- 1...Qe7
- 2.c3#
- 1...Qf7
- 2.c3#
- 1...Qg7
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rd4
- 2.Rxd4#
- 1...Ra5
- 2.Rd4#
- 1...Ra6
- 2.Rd4#
- 1...Ra7
- 2.Rd4#
- 1...Ra8
- 2.Rd4#
- 1...Bf5
- 2.Qxf5#
- 1...Bg8
- 2.Qf5#
- 1...Bb4
- 2.Rd4#
- 2.c3#
- 1...Bd6
- 2.Sxd6#
- 1...Bh6
- 2.Sd6#
- 1...Bg7
- 2.Sd6#
- 1...Se3
- 2.f3#
- 1...Sb4
- 2.Rd4#
- 1...Sxf4
- 2.Rxf4#
- 1...Sb6
- 2.c3#
- 1...Sxf6
- 2.Sxf6#
- 1...Se7
- 2.Sd6#
- 1...Se6
- 2.Qxe6#
- 1...Qxc6
- Tries
- 1.Re1+?
- 1...Re3
- 2.f3#
- 1...Se3!
- 1...Re3
- 1.Re6+?
- 1...Sxe6
- 2.Qxe6#
- 1...Kf5!
- 1...Sxe6
- 1.Qxb7?
- threat
- 2.Qxh7#
- 2.c3#
- 1...Sxf4
- 2.Rxf4#
- 1...Sxf6
- 2.c3#
- 1...Sxb7
- 2.c3#
- 1...Ra1
- 2.Qxh7#
- 1...Ra2
- 2.Qxh7#
- 1...Rb3
- 2.Qxh7#
- 2.cxb3#
- 1...Rc3
- 2.Qxh7#
- 1...Rd3
- 2.Qxh7#
- 2.cxd3#
- 1...Re3
- 2.Qxh7#
- 1...Rf3
- 2.Qxh7#
- 1...Rg3
- 2.Qxh7#
- 1...Rb4
- 2.Qxh7#
- 1...Rd4
- 2.Rxd4#
- 2.Qxh7#
- 1...Ra7
- 2.Rd4#
- 2.c3#
- 1...Bf5
- 2.c3#
- 1...Bg6
- 2.c3#
- 1...Bg8
- 2.c3#
- 1...Be7
- 2.c3#
- 1...Bg7
- 2.Sd6#
- 2.c3#
- 1...Sc3
- 2.Qxh7#
- 1...Se3
- 2.f3#
- 1...Sb4
- 2.Rd4#
- 2.Qxh7#
- 1...Sc7
- 2.c3#
- 1...Se7
- 2.Sd6#
- 2.c3#
- 1...Sf7
- 2.c3#
- 1...Rh3!
- threat
- 1.c4+?
- 1...Rd3
- 2.Bxd3#
- 1...Qxb1!
- 1...Rd3
- 1.Re1+?
- Keys
- 1.Qd7!
- threat
- 2.Qxd5#
- 1...Qxc6
- 2.Qxh7#
- 2.c3#
- 1...Qxd7
- 2.c3#
- 1...Sxf4
- 2.Rxf4#
- 1...Sxf6
- 2.Sxf6#
- 1...Qb3
- 2.Qxh7#
- 2.cxb3#
- 1...Qb5
- 2.Qxh7#
- 1...Rd3
- 2.cxd3#
- 1...Rd4
- 2.Rxd4#
- 1...Ra5
- 2.Rd4#
- 1...Bg8
- 2.Qf5#
- 1...Bd6
- 2.Sxd6#
- 1...Sc3
- 2.Qd3#
- 1...Se3
- 2.f3#
- 1...Sb4
- 2.Rd4#
- 2.Qd4#
- 1...Sb6
- 2.c3#
- 1...Sc7
- 2.Qxh7#
- 1...Se7
- 2.Sd6#
- threat
- 1.Qd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 18
- Sets
- Q(e);N_GUARD,XS(I)::B(A)+P(D)
- Q(e);N_GUARD::B(A)+P(D)
- Q(e);N_GUARD,XQ(K)::B(A)+P(D)
- Q(e);OGATE::B(A)+P(D),XQ(e)
- Q(e);N_GUARD,P_PINP(E)::B(A)+P(D)
- R(a);OGATE::B(A)+P(D),XR(a)
- R(a);OGATE::P(D),XR(a)
- R(b);N_GUARD::R1(B),XR(b)
- R(b);N_GUARD::R1(B)
- B(f);N_GUARD::QAB1(K),XB(f)
- B(f);N_GUARD::QAB1(K)
- B(h);N_GUARD::S(L),XB(h)
- B(h);N_GUARD::S(L)
- S(d);SBLOCK,S_CUTR(a)::P(E)
- S(d);S_CUTR(b)::R1(B)
- S(d);OGATE,XP(G)::R1(J),XS(d)
- S(d);S_CUTQ(e)::B(A)+P(D)
- S(d);XR(J)::S(L),XS(d)
- S(d);S_CUTB(h)::S(L)
- S(g);N_GUARD::QAR2(K),XS(g)
- Tries
- Try
- R(B);CHECK
- Vars
- R(a);P_SPINR(a)::P(E)
- Refutation
- S(d);P_SPINS(d)
- Try
- R(J);CHECK
- Vars
- S(g);OGATE,XR(J)::QAR2(K),XS(g)
- Refutation
- K(c);S_FLIGHT
- Try
- Q(K);XQ(e)
- Threat
- DUALS(2)
- Vars
- S(d);OGATE,XP(G)::R1(J),XS(d)
- S(d);XR(J)::B(A)+P(D)
- S(g);XQ(K)::B(A)+P(D)
- R(a);::QAB(K),XB(f)
- R(a);P_PINP(F)::QAB(K),XB(f)
- R(b);::QAB(K),XB(f)
- B(f);::B(A)+P(D)
- B(h);::B(A)+P(D)
- S(d);::QAB(K),XB(f)
- S(d);SBLOCK,S_CUTR(a)::P(E)
- S(d);::B(A)+P(D)
- S(g);::B(A)+P(D)
- Refutation
- R(a);
- Try
- P(D);CHECK
- Vars
- R(a);N_GUARD,P_SPINR(a)::B(A),XR(a)
- Refutation
- Q(e);P_PINR(B),XB(A)
- Try
- Actual
- Q(K);
- Threat
- QAB1(K),XS(d)
- Vars
- Q(e);N_GUARD,XQ(K)::B(A)+P(D)
- S(d);OGATE,XP(G)::R1(J),XS(d)
- S(d);XR(J)::S(L),XS(d)
- Q(e);N_GUARD::QAB(K),XB(f)
- R(a);OGATE::P(D),XR(a)
- R(b);N_GUARD::R1(B),XR(b)
- R(b);N_GUARD::R1(B)
- B(f);N_GUARD::QAB1(K)
- B(h);N_GUARD::S(L),XB(h)
- S(d);OGATE::QAB1(K)
- S(d);SBLOCK,S_CUTR(a)::P(E)
- S(d);S_CUTQ(e)::B(A)+P(D)
- S(d);S_CUTQ(e)::QAB(K),XB(f)
- S(d);S_CUTB(h)::S(L)
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).