MESON Chess Problem Database
Problem Display
PID: 261171 (1q2n3/1Rp3pQ/r2P1P2/2R1NpP1/Bp2kP1n/2p5/r1P1NK2/8 w - - 0 1)
Wessels, Martin
Comm., Neue Zurcher Zeitung, 1995
#2
12 + 11
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qa7
- 2.Rxb4#
- 1...Qa8
- 2.Rxb4#
- 1...Qc8
- 2.Rxb4#
- 1...Qd8
- 2.Rxb4#
- 1...Rxc2
- 2.Bxc2#
- 1...Ra5
- 2.Bc6#
- 1...Rc6
- 2.Bxc6#
- 1...Ra7
- 2.Bc6#
- 1...Ra8
- 2.Bc6#
- 1...Sg6
- 2.Qh1#
- 1...Qa7
- Tries
- 1.Sxc3+?
- 1...Kd4
- 2.Rc4#
- 1...Kxf4
- 2.Qxh4#
- 1...bxc3!
- 1...Kd4
- 1.Sg3+?
- 1...Kxf4
- 2.Qxh4#
- 1...Kd4!
- 1...Kxf4
- 1.Sd3?
- threat
- 2.Re5#
- 1...cxd6
- 2.Re7#
- 1...gxf6
- 2.Qe7#
- 1...Qa7
- 2.Rxb4#
- 1...Ra5
- 2.Bc6#
- 1...Sf3
- 2.Qxf5#
- 1...Sg6
- 2.Qh1#
- 1...Rxc2!
- threat
- 1.Sf3?
- threat
- 2.Re5#
- 1...Rxc2
- 2.Bxc2#
- 1...Sxf3
- 2.Qxf5#
- 1...cxd6
- 2.Re7#
- 1...gxf6
- 2.Qe7#
- 1...Qa7
- 2.Rxb4#
- 1...Ra5
- 2.Bc6#
- 1...Sg6!
- threat
- 1.Sc4?
- threat
- 2.Re5#
- 1...Rxc2
- 2.Bxc2#
- 1...cxd6
- 2.Re7#
- 1...gxf6
- 2.Qe7#
- 1...Ra5
- 2.Bc6#
- 1...Sf3
- 2.Qxf5#
- 1...Sg6
- 2.Qh1#
- 1...Qa7!
- threat
- 1.Sc6?
- threat
- 2.Re5#
- 1...Rxc2
- 2.Bxc2#
- 1...cxd6
- 2.Re7#
- 1...gxf6
- 2.Qe7#
- 1...Qa7
- 2.Rxb4#
- 1...Sf3
- 2.Qxf5#
- 1...Sg6
- 2.Qh1#
- 1...Ra5!
- threat
- 1.Sg6?
- threat
- 2.Re5#
- 1...Rxc2
- 2.Bxc2#
- 1...Sxg6
- 2.Qh1#
- 1...cxd6
- 2.Re7#
- 1...gxf6
- 2.Qe7#
- 1...Qa7
- 2.Rxb4#
- 1...Ra5
- 2.Bc6#
- 1...Sf3!
- threat
- 1.Sd7?
- threat
- 2.Re5#
- 1...Rxc2
- 2.Bxc2#
- 1...gxf6
- 2.Qe7#
- 1...Qa7
- 2.Rxb4#
- 1...Ra5
- 2.Bc6#
- 1...Sf3
- 2.Qxf5#
- 1...Sg6
- 2.Qh1#
- 1...cxd6!
- threat
- 1.Sf7?
- threat
- 2.Re5#
- 1...Rxc2
- 2.Bxc2#
- 1...cxd6
- 2.Re7#
- 1...Qa7
- 2.Rxb4#
- 1...Ra5
- 2.Bc6#
- 1...Sf3
- 2.Qxf5#
- 1...Sg6
- 2.Qh1#
- 1...gxf6!
- threat
- 1.Qg8?
- threat
- 2.Rc4#
- 2.Qc4#
- 2.Qd5#
- 1...Qxb7
- 2.Rc4#
- 2.Qc4#
- 1...Sxd6
- 2.Qd5#
- 1...Sxf6
- 2.Rc4#
- 2.Qc4#
- 1...Qa7
- 2.Rxb4#
- 2.Qc4#
- 2.Qd5#
- 1...Rc6
- 2.Bxc6#
- 2.Qc4#
- 2.Qd5#
- 1...Sf3
- 2.Qd5#
- 1...c6
- 2.Rc4#
- 2.Qc4#
- 1...Rxd6!
- threat
- 1.Sxc3+?
- Keys
- 1.Sg4!
- threat
- 2.Re5#
- 1...Rxc2
- 2.Bxc2#
- 1...cxd6
- 2.Re7#
- 1...gxf6
- 2.Qe7#
- 1...Qa7
- 2.Rxb4#
- 1...Ra5
- 2.Bc6#
- 1...Sf3
- 2.Qxf5#
- 1...Sg6
- 2.Qh1#
- threat
- 1.Sg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 6
- Sets
- Q(j);N_GUARD,P_PINR(F)::R(K),XP(c)
- Q(j);N_GUARD::R(K),XP(c)
- R(a);OGATE,P_PINS(B),XP(A)::B(D),XR(a)
- R(g);N_GUARD::B(D)
- R(g);N_GUARD::B(D),XR(g)
- S(e);N_SPINP(f),OGATE::QAB(L)
- Tries
- Try
- S(B);CHECK,P_SPINP(A),XP(b)
- Vars
- K(d);N_SPINP(f),P-FLIGHT::R1(F)
- K(d);N_GUARD,N_SPINP(f),P-FLIGHT,S_CUTP(c),XP(E)::QAR2(L),XS(e)
- Refutation
- P(c);XS(B)
- Try
- S(B);CHECK,P_SPINP(A)
- Vars
- K(d);N_GUARD,N_SPINP(f),P-FLIGHT,XP(E)::QAR2(L),XS(e)
- Refutation
- K(d);N_SPINP(f),P-FLIGHT
- Try
- S(G);
- Threat
- R1(F)
- Vars
- P(h);OGATE,XP(I)::R(K)
- P(i);OGATE,XP(J)::QAR(L)
- Q(j);N_GUARD,P_PINR(F)::R(K),XP(c)
- R(g);N_GUARD::B(D)
- S(e);N_GUARD::QAB1(L),XP(f)
- S(e);N_SPINP(f),OGATE::QAB(L)
- Refutation
- R(a);P_PINS(B),XP(A)
- Try
- S(G);
- Threat
- R1(F)
- Vars
- R(a);OGATE,P_PINS(B),XP(A)::B(D),XR(a)
- S(e);N_GUARD,XS(G)::QAB1(L),XP(f)
- P(h);OGATE,XP(I)::R(K)
- P(i);OGATE,XP(J)::QAR(L)
- Q(j);N_GUARD,P_PINR(F)::R(K),XP(c)
- R(g);N_GUARD::B(D)
- Refutation
- S(e);N_SPINP(f)
- Try
- S(G);
- Threat
- R1(F)
- Vars
- R(a);OGATE,P_PINS(B),XP(A)::B(D),XR(a)
- P(h);OGATE,XP(I)::R(K)
- P(i);OGATE,XP(J)::QAR(L)
- R(g);N_GUARD::B(D)
- S(e);N_GUARD::QAB1(L),XP(f)
- S(e);N_SPINP(f),OGATE::QAB(L)
- Refutation
- Q(j);P_PINR(F)
- Try
- S(G);
- Threat
- R1(F)
- Vars
- R(a);OGATE,P_PINS(B),XP(A)::B(D),XR(a)
- P(h);OGATE,XP(I)::R(K)
- P(i);OGATE,XP(J)::QAR(L)
- Q(j);N_GUARD,P_PINR(F)::R(K),XP(c)
- S(e);N_GUARD::QAB1(L),XP(f)
- S(e);N_SPINP(f),OGATE::QAB(L)
- Refutation
- R(g);
- Try
- S(G);N_PINP(f)
- Threat
- R1(F)
- Vars
- R(a);OGATE,P_PINS(B),XP(A)::B(D),XR(a)
- S(e);OGATE,XS(G)::QAB(L)
- P(h);OGATE,XP(I)::R(K)
- P(i);OGATE,XP(J)::QAR(L)
- Q(j);N_GUARD,P_PINR(F)::R(K),XP(c)
- R(g);N_GUARD::B(D)
- Refutation
- S(e);
- Try
- S(G);
- Threat
- R1(F)
- Vars
- R(a);OGATE,P_PINS(B),XP(A)::B(D),XR(a)
- P(i);OGATE,XP(J)::QAR(L)
- Q(j);N_GUARD,P_PINR(F)::R(K),XP(c)
- R(g);N_GUARD::B(D)
- S(e);N_GUARD::QAB1(L),XP(f)
- S(e);N_SPINP(f),OGATE::QAB(L)
- Refutation
- P(h);XP(I)
- Try
- S(G);
- Threat
- R1(F)
- Vars
- R(a);OGATE,P_PINS(B),XP(A)::B(D),XR(a)
- P(h);OGATE,XP(I)::R(K)
- Q(j);N_GUARD,P_PINR(F)::R(K),XP(c)
- R(g);N_GUARD::B(D)
- S(e);N_GUARD::QAB1(L),XP(f)
- S(e);N_SPINP(f),OGATE::QAB(L)
- Refutation
- P(i);XP(J)
- Try
- Q(L);N_PINP(f)
- Threat
- DUALS(3)
- Vars
- S(k);XP(I)::QAB1(L)
- S(e);::QAB1(L)
- Refutation
- R(g);XP(I)
- Try
- Actual
- S(G);
- Threat
- R1(F)
- Vars
- R(a);OGATE,P_PINS(B),XP(A)::B(D),XR(a)
- P(h);OGATE,XP(I)::R(K)
- P(i);OGATE,XP(J)::QAR(L)
- Q(j);N_GUARD,P_PINR(F)::R(K),XP(c)
- R(g);N_GUARD::B(D)
- S(e);N_GUARD::QAB1(L),XP(f)
- S(e);N_SPINP(f),OGATE::QAB(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).