MESON Chess Problem Database
Problem Display
PID: 179944 (6QK/2Np1p1B/1p4P1/4N3/2RPkPP1/Rr3pP1/2Pq1p2/2Br4 w - - 0 1)
Gross, Erwin
Haring, Jacobus
Die Schwalbe, 1973
#2
14 + 9
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.gxf7#
- 1...Qc3
- 2.gxf7#
- 1...Qe3
- 2.gxf7#
- 1...Qb4
- 2.gxf7#
- 1...Qa5
- 2.gxf7#
- 1...Qxc2
- 2.gxf7#
- 1...Qe2
- 2.gxf7#
- 1...Qd3
- 2.gxf7#
- 1...Qxd4
- 2.gxf7#
- 1...Rb1
- 2.gxf7#
- 1...Rb2
- 2.gxf7#
- 1...Re3
- 2.gxf7#
- 1...Rb4
- 2.gxf7#
- 1...Rb5
- 2.gxf7#
- 1...Qe1
- Tries
- 1.Sd3?
- threat
- 2.Qe8#
- 1...Ke3
- 2.Qe8#
- 1...Qxf4
- 2.Sxf2#
- 2.d5#
- 1...Qxc2
- 2.gxf7#
- 1...Qb4
- 2.Sxf2#
- 2.gxf7#
- 1...Qa5
- 2.Sxf2#
- 2.d5#
- 1...Rb5!
- threat
- 1.Sxf7?
- threat
- 2.Qe8#
- 1...Qxd4+
- 2.g7#
- 1...Ke3
- 2.Qe8#
- 1...Qxc2
- 2.g7#
- 1...Qb4
- 2.Sg5#
- 2.g7#
- 1...Qa5
- 2.Sd6#
- 1...Rb5
- 2.Sd6#
- 1...Qxf4!
- threat
- 1.Bxd2?
- threat
- 2.d5#
- 2.gxf7#
- 1...fxg6
- 2.Bxg6#
- 2.Qd5#
- 2.Qxg6#
- 2.d5#
- 1...f1Q
- 2.gxf7#
- 1...f1B
- 2.gxf7#
- 1...Rh1
- 2.d5#
- 1...Rc3
- 2.gxf7#
- 1...Rd3
- 2.cxd3#
- 2.gxf7#
- 1...Rb4
- 2.Re3#
- 2.gxf7#
- 1...b5
- 2.gxf7#
- 1...d5
- 2.gxf7#
- 1...f5
- 2.Qd5#
- 2.d5#
- 1...f6
- 2.Qd5#
- 2.d5#
- 1...Rxd2!
- threat
- 1.Qa8+?
- 1...Ke3
- 2.Qxf3#
- 1...d5!
- 1...Ke3
- 1.Qe8?
- threat
- 2.Sd3#
- 2.Sc6#
- 2.Sxd7#
- 2.Sxf7#
- 1...Ke3
- 2.Sd3#
- 2.Sc6#
- 2.Sxd7#
- 2.Sxf7#
- 1...Qxc2
- 2.gxf7#
- 1...Qxd4
- 2.gxf7#
- 1...fxg6
- 2.Sd3#
- 2.Sc6#
- 2.Sxg6#
- 2.Sxd7#
- 2.Sf7#
- 1...Qb4
- 2.gxf7#
- 1...Qa5
- 2.gxf7#
- 1...Qd3
- 2.Sxd3#
- 2.Sc6#
- 2.Sxd7#
- 2.Sxf7#
- 2.gxf7#
- 1...Rd3
- 2.Sxd3#
- 2.Sc6#
- 2.Sxd7#
- 2.Sxf7#
- 1...Rb5
- 2.gxf7#
- 1...d5
- 2.Sd3#
- 2.Sc6#
- 2.Sd7#
- 2.Sxf7#
- 1...d6
- 2.Sd3#
- 2.Sc6#
- 2.Sd7#
- 2.Sxf7#
- 1...f5
- 2.Sd3#
- 2.Sc6#
- 2.Sxd7#
- 2.Sf7#
- 1...f6
- 2.Sd3#
- 2.Sc6#
- 2.Sxd7#
- 2.Sf7#
- 1...Qxf4!
- threat
- 1.d5+?
- 1...Qd4
- 2.gxf7#
- 1...Ke3!
- 1...Qd4
- 1.Sd3?
- Keys
- 1.Sxd7!
- threat
- 2.Qe8#
- 1...Qxd4+
- 2.Sf6#
- 1...Ke3
- 2.Qe8#
- 1...Qxf4
- 2.Qa8#
- 1...Qxc2
- 2.gxf7#
- 1...Qb4
- 2.Sf6#
- 2.Qa8#
- 2.gxf7#
- 1...Qa5
- 2.Sf6#
- 1...Rb5
- 2.Sf6#
- threat
- 1.Sxd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 2
- REMOVED MATES = 10
- Sets
- Q(b);::B(L)+P(J),XP(i)
- Q(b);XP(B)::B(L)+P(J),XP(i)
- Q(b);P_PINS(I),P_SPINQ(b),XP(F)::B(L)+P(J),XP(i)
- R(d);::B(L)+P(J),XP(i)
- Tries
- Try
- S(I);
- Threat
- QAR(M)
- Vars
- K(f);P-FLIGHT,P_SPINQ(b)::QAR(M)
- Q(b);XP(B)::B(L)+P(J),XP(i)
- Refutation
- R(d);
- Try
- S(I);XP(i)
- Threat
- QAR(M)
- Vars
- Q(b);CHECK,P_SPINQ(b),XP(F)::B(L)+P(J)
- K(f);P-FLIGHT,P_SPINQ(b),P_SPINR(d)::QAR(M)
- Q(b);XP(B)::B(L)+P(J)
- Q(b);::S(I)
- R(d);::S(I)
- Refutation
- Q(b);XP(G)
- Try
- B(A);XQ(b)
- Threat
- DUALS(2)
- Vars
- P(c);::B(L)+P(J),XP(i)
- R(a);P_PINB(L)::R(E)+P(F)
- R(d);::B(L)+P(J),XP(i)
- P(g);::B(L)+P(J),XP(i)
- P(h);::B(L)+P(J),XP(i)
- Refutation
- R(a);XB(A)
- Try
- Q(M);CHECK
- Vars
- K(f);OGATE,P-FLIGHT,P_SPINQ(b),P_SPINR(d)::QAR1(M),XP(e)
- Refutation
- P(h);P_SPINP(h)
- Try
- Q(M);
- Threat
- DUALS(4)
- Vars
- Q(b);XP(B)::B(L)+P(J),XP(i)
- Q(b);P_PINS(I),P_SPINQ(b),XP(F)::B(L)+P(J),XP(i)
- Q(b);::B(L)+P(J),XP(i)
- R(d);::B(L)+P(J),XP(i)
- Refutation
- Q(b);XP(G)
- Try
- P(F);CHECK
- Vars
- Q(b);P_PINS(I),P_SPINQ(b)::B(L)+P(J),XP(i)
- Refutation
- K(f);P-FLIGHT,P_SPINQ(b),P_SPINR(d)
- Try
- Actual
- S(I);XP(h)
- Threat
- QAR(M)
- Vars
- Q(b);CHECK,P_SPINQ(b),XP(F)::S(I)
- K(f);P-FLIGHT,P_SPINQ(b),P_SPINR(d)::QAR(M)
- Q(b);XP(G)::QAB(M)
- Q(b);XP(B)::B(L)+P(J),XP(i)
- Q(b);::S(I)
- R(d);::S(I)
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).