MESON Chess Problem Database
Problem Display
PID: 44060 (3K4/1pN1p3/b2N4/2P1k1PQ/4p2r/2P1q1P1/3PBP2/4R3 w - - 0 1)
Nietvelt, Gustaaf Josephus
4th Prize, Sports Referee, 1930
#2
12 + 7
| 20 | De Problemist | 1931 |
SOLUTION
- SOUND
- Sets
- 1...Qxg5
- 2.Qxg5#
- 1...Rg4
- 2.Qh8#
- 1...Qxg5
- Tries
- 1.Qg6?
- threat
- 2.Sf7#
- 2.Qf5#
- 2.Qe6#
- 2.Qg7#
- 1...Qxd2
- 2.Qf5#
- 2.Qe6#
- 2.Qg7#
- 1...Qxf2
- 2.Qe6#
- 1...Qxc5
- 2.Sf7#
- 2.Qe6#
- 1...Qxg5
- 2.Sf7#
- 2.Qxg5#
- 2.Qe6#
- 1...Qxc3
- 2.Qg7#
- 1...Qxg3
- 2.Qf5#
- 1...exd6
- 2.Qe6#
- 2.Qf6#
- 1...Qd4
- 2.Qf5#
- 2.Qe6#
- 2.Qg7#
- 1...Qf4
- 2.Qe6#
- 1...Qd3
- 2.Qf5#
- 2.Qe6#
- 2.Qg7#
- 1...Qf3
- 2.Qe6#
- 1...Rf4
- 2.Qe6#
- 1...Rh6
- 2.Sf7#
- 2.Qf5#
- 1...Rh7
- 2.Qf5#
- 2.Qe6#
- 1...Bc4
- 2.Sxc4#
- 2.Qf5#
- 2.Qg7#
- 1...e6
- 2.Sf7#
- 2.Qxe6#
- 2.Qf6#
- 2.Qg7#
- 1...Rh8+!
- threat
- 1.Qf7?
- threat
- 2.Qd5#
- 2.Qe6#
- 2.Qf5#
- 2.Qxe7#
- 2.Qg7#
- 1...Qxd2
- 2.Qe6#
- 2.Qf5#
- 2.Qxe7#
- 2.Qg7#
- 1...Qxf2
- 2.Qd5#
- 2.Qe6#
- 2.Qxe7#
- 1...Qxc5
- 2.Qe6#
- 2.Qxe7#
- 1...Qxg5
- 2.Qe6#
- 1...Qxc3
- 2.Qd5#
- 2.Qg7#
- 1...Qxg3
- 2.Qf5#
- 1...exd6
- 2.Qd5#
- 2.Qe6#
- 2.Qf6#
- 1...Qd4
- 2.Qe6#
- 2.Qf5#
- 2.Qxe7#
- 2.Qg7#
- 1...Qf4
- 2.Qd5#
- 2.Qe6#
- 2.Qxe7#
- 1...Qd3
- 2.Qe6#
- 2.Qf5#
- 2.Qxe7#
- 2.Qg7#
- 1...Qf3
- 2.Qd5#
- 2.Qe6#
- 2.Qxe7#
- 1...Rf4
- 2.Qd5#
- 2.Qe6#
- 2.Qxe7#
- 1...Rh6
- 2.Qd5#
- 2.Qf5#
- 1...Rh7
- 2.Qd5#
- 2.Qe6#
- 2.Qf5#
- 1...Bc4
- 2.Sxc4#
- 2.Qf5#
- 2.Qg7#
- 1...e6
- 2.Qxe6#
- 2.Qf6#
- 2.Qg7#
- 1...Rh8+!
- threat
- 1.g6+?
- 1...Kf6
- 2.Sde8#
- 1...Qg5
- 2.Qxg5#
- 1...Rxh5!
- 1...Kf6
- 1.Qg6?
- Keys
- 1.Bg4!
- threat
- 2.Sf7#
- 1...Qxd2
- 2.Rxe4#
- 1...Qxf2
- 2.Rxe4#
- 1...Qxg5
- 2.Qxg5#
- 1...Qxc3
- 2.Rxe4#
- 1...Qxg3
- 2.Rxe4#
- 1...Rxg4
- 2.Qh8#
- 1...exd6
- 2.Qe8#
- 1...Qd4
- 2.f4#
- 1...Qf4
- 2.d4#
- 1...Qd3
- 2.f4#
- 1...Qf3
- 2.d4#
- 1...Bc4
- 2.Sxc4#
- threat
- 1.Bg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 10
- REMOVED MATES = 0
- Sets
- Q(a);OGATE,P_SPINQ(a),XP(H)::QAR2(I),XQ(a)
- R(c);N_GUARD::QAB(I)
- Tries
- Try
- Q(I);
- Threat
- DUALS(4)
- Vars
- Q(a);XP(D)::QAR1(I)
- Q(a);XP(E)::QAB(I)
- Q(a);XP(F)::QAR1(I)
- Q(a);::QAR1(I)
- R(c);::QAR1(I)
- Refutation
- R(c);CHECK
- Try
- Q(I);
- Threat
- DUALS(5)
- Vars
- Q(a);XP(H)::QAR1(I)
- Q(a);XP(F)::QAR1(I)
- Refutation
- R(c);CHECK
- Try
- P(H);CHECK
- Vars
- K(d);S_FLIGHT::S(J)
- Q(a);N_GUARD,P_SPINQ(a)::QAR2(I),XQ(a)
- Refutation
- R(c);XQ(I)
- Try
- Actual
- B(C);
- Threat
- S(J)
- Vars
- Q(a);OGATE,P_PINS(J),P_SPINP(b),XP(B)::R1(A),XP(b)
- Q(a);OGATE,P_SPINP(b),XP(D)::R1(A),XP(b)
- Q(a);OGATE,P_SPINP(b),P_SPINQ(a),XP(H)::QAR2(I),XQ(a)
- Q(a);OGATE,P_SPINP(b),XP(E)::R1(A),XP(b)
- Q(a);OGATE,P_SPINP(b),XP(F)::R1(A),XP(b)
- R(c);N_GUARD,XB(C)::QAB(I)
- P(g);OGATEB,XS(J)::QAR(I)
- Q(a);N_GUARD,P_PINS(J),P_SPINP(b)::P(D)
- Q(a);N_GUARD,P_SPINP(b)::P(B)
- B(e);N_GUARD::S(J),XB(e)
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).