MESON Chess Problem Database
Problem Display
PID: 62090 (B4B2/b1r5/r1n3p1/R5p1/2Nk4/1Pp4p/2P2nq1/2K1RQN1 w - - 0 1)
Forster, Klaus
1st HM., Die Schwalbe, 1989
#2
10 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxf1
- 2.Sf3#
- 1...Qh1
- 2.Qxf2#
- 1...Qf3
- 2.Sxf3#
- 1...Qd5
- 2.Qxf2#
- 1...Qh2
- 2.Sf3#
- 1...Qg4
- 2.Qxf2#
- 1...Sd1
- 2.Qd3#
- 1...Sh1
- 2.Qd3#
- 1...Sd3+
- 2.Qxd3#
- 1...Se4
- 2.Qd3#
- 1...Sg4
- 2.Qd3#
- 1...Sb4
- 2.Se2#
- 1...Sxa5
- 2.Se2#
- 1...Se5
- 2.Se2#
- 1...Se7
- 2.Se2#
- 1...Sb8
- 2.Se2#
- 1...Sd8
- 2.Se2#
- 1...Qxf1
- Tries
- 1.Sa3?
- threat
- 2.Qc4#
- 1...Sd3+
- 2.Qxd3#
- 1...Qxf1
- 2.Sf3#
- 1...Sxa5
- 2.Sb5#
- 1...Qd5
- 2.Qxf2#
- 1...Sb4
- 2.Sb5#
- 1...Se5
- 2.Sb5#
- 1...Sb8
- 2.Sb5#
- 1...Sd8
- 2.Sb5#
- 1...Se7!
- threat
- 1.Bc5+?
- 1...Kd5
- 2.Re5#
- 1...Bxc5!
- 1...Kd5
- 1.Bg7+?
- 1...Se5
- 2.Se2#
- 2.Bxe5#
- 1...Rxg7!
- 1...Se5
- 1.Rd1+?
- 1...Sxd1
- 2.Qd3#
- 1...Sd3+
- 2.Qxd3#
- 1...Ke4!
- 1...Sxd1
- 1.Rd5+?
- 1...Qxd5
- 2.Qxf2#
- 1...Kxd5!
- 1...Qxd5
- 1.Qxg2?
- threat
- 2.Se2#
- 2.Sf3#
- 2.Rd5#
- 2.Qd5#
- 2.Qxf2#
- 1...Rxa5
- 2.Se2#
- 1...Sxa5
- 2.Se2#
- 2.Sf3#
- 2.Qd5#
- 2.Qxf2#
- 1...hxg2
- 2.Sf3#
- 1...Rd7
- 2.Se2#
- 2.Sf3#
- 2.Qxf2#
- 1...Re7
- 2.Sf3#
- 2.Rd5#
- 2.Qd5#
- 1...Rf7
- 2.Se2#
- 2.Rd5#
- 2.Qd5#
- 1...Bc5
- 2.Se2#
- 2.Bxc5#
- 1...Sd1
- 2.Se2#
- 2.Sf3#
- 2.Rxd1#
- 2.Re4#
- 2.Rd5#
- 2.Qe4#
- 2.Qd5#
- 2.Qg4#
- 1...Sh1
- 2.Se2#
- 2.Sf3#
- 2.Rd1#
- 2.Re4#
- 2.Rd5#
- 2.Qe4#
- 2.Qd5#
- 2.Qg4#
- 1...Se4
- 2.Se2#
- 2.Sf3#
- 2.Rxe4#
- 2.Qxe4#
- 1...Sg4
- 2.Se2#
- 2.Sf3#
- 2.Rd1#
- 2.Re4#
- 2.Rd5#
- 2.Qe4#
- 2.Qd5#
- 2.Qxg4#
- 1...Sb4
- 2.Se2#
- 2.Sf3#
- 2.Qxf2#
- 1...Se5
- 2.Se2#
- 2.Rd5#
- 2.Qd5#
- 2.Qxf2#
- 1...Se7
- 2.Se2#
- 2.Sf3#
- 2.Qxf2#
- 1...g4
- 2.Se2#
- 2.Rd5#
- 2.Qd5#
- 2.Qxf2#
- 1...Sd3+!
- threat
- 1.Sa3?
- Keys
- 1.Sd6!
- threat
- 2.Qc4#
- 1...Sd3+
- 2.Qxd3#
- 1...Qxf1
- 2.Sf3#
- 1...Sxa5
- 2.Sb5#
- 1...Qd5
- 2.Qxf2#
- 1...Sb4
- 2.Sb5#
- 1...Se5
- 2.Sb5#
- 1...Se7
- 2.Bg7#
- 1...Sb8
- 2.Sb5#
- 1...Sd8
- 2.Sb5#
- threat
- 1.Sd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 6
- ADDED MATES = 0
- REMOVED MATES = 8
- Sets
- Q(b);N_GUARD,P_PINR(B),XQ(C)::S(D)
- Q(b);N_GUARD::QAB(C),XS(a)
- Q(b);N_GUARD::S(D),XQ(b)
- Q(b);N_GUARD::S(D)
- S(a);N_GUARD::QAR1(C)
- S(a);CHECK,N_GUARD::QAR1(C),XS(a)
- S(h);::S(D)
- S(h);XR(H)::S(D)
- Tries
- Try
- S(G);
- Threat
- QAR1(C)
- Vars
- S(a);CHECK,N_GUARD::QAR1(C),XS(a)
- Q(b);N_GUARD,P_PINR(B),XQ(C)::S(D)
- S(h);XR(H)::S(G)
- Q(b);N_GUARD::QAB(C),XS(a)
- S(h);::S(G)
- Refutation
- S(h);
- Try
- B(J);CHECK
- Vars
- K(e);P-FLIGHT,P_SPINS(h)::R1(B)
- Refutation
- B(j);XB(J)
- Try
- B(J);CHECK
- Refutation
- R(k);XB(J)
- Try
- R(B);CHECK
- Vars
- S(a);N_GUARD,XR(B)::QAR1(C)
- S(a);CHECK,N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
- Refutation
- K(e);P-FLIGHT,P_SPINS(h)
- Try
- R(H);CHECK
- Vars
- Q(b);SBLOCK,XR(H)::QAB(C),XS(a)
- Refutation
- K(e);P-FLIGHT,P_SPINS(h),XR(H)
- Try
- Q(C);XQ(b)
- Threat
- DUALS(5)
- Vars
- R(g);XR(H)::S(D)
- P(d);XQ(C)::S(D)
- Refutation
- S(a);CHECK
- Try
- Actual
- S(G);
- Threat
- QAR1(C)
- Vars
- S(a);CHECK,N_GUARD::QAR1(C),XS(a)
- Q(b);N_GUARD,P_PINR(B),XQ(C)::S(D)
- S(h);XR(H)::S(G)
- Q(b);N_GUARD::QAB(C),XS(a)
- S(h);::S(G)
- S(h);N_GUARD,S_CUTR(k)::B(J)
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).