MESON Chess Problem Database
Problem Display
PID: 18946 (7q/r1p1P3/2R1N3/1P1kP2R/2npN2p/1r1B2bK/n1p5/1Q6 w - - 0 1)
Goldschmeding, Cornelis
2nd Place, Shakhmaty v SSSR, 1959
#2
10 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxe5
- 2.Sf6#
- 1...Qf6
- 2.Sxf6#
- 1...Qh7
- 2.Sf6#
- 1...Qa8
- 2.Sf6#
- 1...Qb8
- 2.Sf6#
- 1...Qc8
- 2.Sf6#
- 1...Qd8
- 2.Sf6#
- 1...Qe8
- 2.Sf6#
- 1...Qg8
- 2.Sf6#
- 1...Rxb5
- 2.Qxb5#
- 1...Ra3
- 2.Sxc7#
- 1...Ra4
- 2.Sxc7#
- 1...Ra5
- 2.Sxc7#
- 1...Ra6
- 2.Sxc7#
- 1...Ra8
- 2.Sxc7#
- 1...Be1
- 2.Sf4#
- 1...Bf2
- 2.Sf4#
- 1...Bf4
- 2.Sxf4#
- 1...Bxe5
- 2.Sf4#
- 1...Sxe5
- 2.Qxb3#
- 1...c1S
- 2.Bxc4#
- 1...c1B
- 2.Bxc4#
- 1...Qxe5
- Tries
- 1.Sc3+?
- 1...Rxc3
- 2.Qh1#
- 1...dxc3
- 2.Qh1#
- 1...Sxc3!
- 1...Rxc3
- 1.Sxg3?
- threat
- 2.Sf4#
- 2.Bxc4#
- 2.Be4#
- 2.Qh1#
- 1...Rxb1
- 2.Sf4#
- 2.Bxc4#
- 2.Be4#
- 1...Rxd3
- 2.Sf4#
- 1...Rxb5
- 2.Be4#
- 2.Qh1#
- 2.Qxb5#
- 1...Sxe5
- 2.Sf4#
- 2.Bc4#
- 2.Be4#
- 2.Qh1#
- 2.Qxb3#
- 1...cxb1Q
- 2.Sf4#
- 2.Bxc4#
- 1...cxb1S
- 2.Sf4#
- 2.Bxc4#
- 2.Be4#
- 1...cxb1B
- 2.Sf4#
- 2.Bxc4#
- 1...cxb1R
- 2.Sf4#
- 2.Bxc4#
- 2.Be4#
- 1...hxg3
- 2.Sf4#
- 1...Sd6
- 2.Sf4#
- 1...c1Q
- 2.Be4#
- 1...c1S
- 2.Sf4#
- 2.Bxc4#
- 2.Be4#
- 1...c1B
- 2.Bxc4#
- 2.Be4#
- 1...c1R
- 2.Sf4#
- 2.Be4#
- 1...Qf6
- 2.Bxc4#
- 2.Be4#
- 1...Qh6
- 2.Bxc4#
- 2.Be4#
- 2.Qh1#
- 1...Qh7
- 2.Sf4#
- 2.Bxc4#
- 1...Qc8
- 2.Bxc4#
- 2.Be4#
- 2.Qh1#
- 1...Qf8
- 2.Bxc4#
- 2.Be4#
- 1...Rc3
- 2.Sf4#
- 2.Be4#
- 2.Qh1#
- 1...Rb4
- 2.Sf4#
- 2.Be4#
- 2.Qh1#
- 1...Ra4
- 2.Sf4#
- 2.Sxc7#
- 2.Be4#
- 2.Qh1#
- 1...Sc1
- 2.Sf4#
- 2.Bxc4#
- 2.Be4#
- 1...Sc3
- 2.Sf4#
- 2.Bxc4#
- 1...Sb2
- 2.Sf4#
- 2.Be4#
- 2.Qh1#
- 1...Sd2
- 2.Sf4#
- 1...Sa3
- 2.Sf4#
- 2.Be4#
- 2.Qh1#
- 1...Se3
- 2.Sf4#
- 2.Be4#
- 1...Sa5
- 2.Sf4#
- 2.Be4#
- 2.Qh1#
- 1...Sb6
- 2.Sf4#
- 2.Be4#
- 2.Qh1#
- 1...Qxh5!
- threat
- 1.Sd8?
- threat
- 2.Rc5#
- 1...Qxd8
- 2.Sf6#
- 1...Rxb5
- 2.Qxb5#
- 1...Rxd3!
- threat
- 1.Sc3+?
- Keys
- 1.S4g5!
- threat
- 2.Rc5#
- 1...Kxe5
- 2.Sh7#
- 1...Qxe5
- 2.Bxc4#
- 1...Rxb5
- 2.Qxb5#
- 1...Bxe5
- 2.Qh1#
- 1...Sxe5
- 2.Be4#
- threat
- 1.S4g5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 1
- REMOVED MATES = 18
- Sets
- Q(k);N_GUARD,P_SPINQ(k),XP(F)::S(D)
- Q(k);N_GUARD::S(D),XQ(k)
- Q(k);N_GUARD::S(D)
- Q(k);N_GUARD,P_PINS(I)::S(D)
- R(c);OGATE,XP(E)::QAR2(A),XR(c)
- R(i);N_GUARD::S(I),XP(j)
- B(d);N_GUARD,P_PINB(B)::S(I)
- B(d);N_GUARD,P_PINB(B)::S(I),XB(d)
- B(d);N_GUARD,P_PINB(B),P_SPINB(d),XP(F)::S(I)
- S(e);OGATEB,P_SPINS(e),XP(F)::QAB(A),XR(c)
- P(b);::B(B),XS(e)
- Tries
- Try
- S(D);CHECK
- Vars
- R(c);XS(D)::QAB(A)
- P(f);XS(D)::QAB(A)
- Refutation
- S(a);XS(D)
- Try
- S(D);XB(d)
- Threat
- DUALS(4)
- Vars
- R(c);P_PINS(D),XB(B)::S(I)
- P(g);P_PINR(G),XS(D)::S(I)
- S(e);::S(I)
- P(b);::B(B)
- Refutation
- Q(k);XR(G)
- Try
- S(I);
- Threat
- R1(H)
- Vars
- Q(k);N_GUARD,XS(I)::S(D)
- R(c);OGATE,XP(E)::QAR2(A),XR(c)
- Refutation
- R(c);XB(B)
- Try
- Actual
- S(D);
- Threat
- R1(H)
- Vars
- K(h);P-FLIGHT,XP(F)::R(G)+S(D)
- Q(k);SBLOCK,XP(F)::B(B),XS(e)
- R(c);OGATE,XP(E)::QAR2(A),XR(c)
- B(d);P_PINB(B),SBLOCK,XP(F)::QAB(A)
- S(e);SBLOCK,XP(F)::B(B)
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).