MESON Chess Problem Database
Problem Display
PID: 80249 (1n2Q1K1/2B1pp2/1N3Ppb/8/R1b1k2N/Rq2P2p/3p1Pr1/3r3B w - - 0 1)
Drese, Gerardus Hendrikus
5th Prize, Pat TT, 1938
#2
11 + 12
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Qxe7#
- 2.f3#
- 1...Qc2
- 2.Qxe7#
- 2.f3#
- 1...Qxa4
- 2.f3#
- 1...Qb1
- 2.Rxc4#
- 2.Qxe7#
- 2.f3#
- 1...Qb2
- 2.f3#
- 1...Qd3
- 2.Qxe7#
- 1...Qb4
- 2.f3#
- 1...Qb5
- 2.f3#
- 1...Qa2
- Tries
- 1.Rxb3?
- threat
- 2.Rxc4#
- 2.Qxe7#
- 2.f3#
- 1...Rc1
- 2.Qxe7#
- 2.f3#
- 1...Rf1
- 2.Rxc4#
- 2.Qxe7#
- 1...Bf4
- 2.Rxc4#
- 2.f3#
- 1...Bf8
- 2.Rxc4#
- 2.f3#
- 1...Sc6
- 2.Qxc6#
- 2.f3#
- 1...Sd7
- 2.Rxc4#
- 2.Qa8#
- 2.f3#
- 1...e5
- 2.Rxc4#
- 2.Qxe5#
- 2.f3#
- 1...e6
- 2.Rxc4#
- 2.f3#
- 1...Bxe3!
- threat
- 1.Rxc4+?
- 1...Qxc4
- 2.f3#
- 1...Kd3!
- 1...Qxc4
- 1.Qb5?
- threat
- 2.Qd5#
- 1...Kd3
- 2.Qxc4#
- 1...Qxa4
- 2.Qe5#
- 2.f3#
- 1...Qxb5
- 2.f3#
- 1...Qd3
- 2.Qe5#
- 1...Qb4
- 2.Qe5#
- 2.f3#
- 1...e6!
- threat
- 1.Qc6+?
- 1...Kd3
- 2.Qxc4#
- 1...Sxc6!
- 1...Kd3
- 1.Qd7?
- threat
- 2.Qd4#
- 2.Qd5#
- 1...Qxa4
- 2.Qd4#
- 2.f3#
- 1...Qxe3
- 2.Qd5#
- 1...Qxb6
- 2.Qd3#
- 2.f3#
- 1...Bxe3
- 2.Qd5#
- 2.f3#
- 1...Qb2
- 2.Qd3#
- 2.Qd5#
- 2.f3#
- 1...Qc3
- 2.Qd5#
- 1...Qd3
- 2.Qxd3#
- 2.Qxe7#
- 1...Qb4
- 2.Qd4#
- 2.f3#
- 1...Qb5
- 2.Qd3#
- 2.Qd4#
- 2.f3#
- 1...Sc6
- 2.Qd5#
- 1...e5
- 2.Qd5#
- 1...e6
- 2.Qd4#
- 1...Sxd7!
- threat
- 1.Qd8?
- threat
- 2.Qd4#
- 2.Qd5#
- 1...Qxa4
- 2.Qd4#
- 2.f3#
- 1...Qxe3
- 2.Qd5#
- 1...Qxb6
- 2.Qd3#
- 2.f3#
- 1...Bxe3
- 2.Qd5#
- 2.f3#
- 1...Qb2
- 2.Qd3#
- 2.Qd5#
- 2.f3#
- 1...Qc3
- 2.Qd5#
- 1...Qd3
- 2.Qxe7#
- 2.Qxd3#
- 1...Qb4
- 2.Qd4#
- 2.f3#
- 1...Qb5
- 2.Qd3#
- 2.Qd4#
- 2.f3#
- 1...Sc6
- 2.Qd5#
- 1...e5
- 2.Qd5#
- 1...e6
- 2.Qd4#
- 1...Sd7!
- threat
- 1.Rxb3?
- Keys
- 1.Qxf7!
- threat
- 2.Qd5#
- 1...Kd3
- 2.Qxc4#
- 1...Qxa4
- 2.f3#
- 1...Qxb6
- 2.f3#
- 1...Qd3
- 2.Qe6#
- 1...Qb4
- 2.f3#
- 1...Qb5
- 2.f3#
- 1...e6
- 2.Qxg6#
- threat
- 1.Qxf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- Q(d);N_SPINB(f),XR(E)::P(B)
- Q(d);::P(B)
- Q(d);::QAR(J),XP(j)
- Q(d);N_SPINB(f)::P(B)
- Tries
- Try
- R(C);XQ(d)
- Threat
- DUALS(3)
- Refutation
- B(i);XP(D)
- Try
- R(E);CHECK,XB(f)
- Vars
- Q(d);XR(E)::P(B)
- Refutation
- K(g);N_SPINP(j),N_SPINR(c),P_SPINQ(d),S_FLIGHT
- Try
- Q(J);N_PINP(j)
- Threat
- QAB1(J)
- Vars
- K(g);N_SPINR(c),P_SPINQ(d),S_FLIGHT::QAB1(J),XB(f)
- Q(d);XQ(J)::P(B)
- Q(d);::QAR1(J)
- Refutation
- P(j);
- Try
- Q(J);CHECK,N_PINP(j)
- Vars
- K(g);N_SPINB(f),N_SPINR(c),P_SPINQ(d),S_FLIGHT::QAB1(J),XB(f)
- Refutation
- S(l);XQ(J)
- Try
- Q(J);N_PINP(j)
- Threat
- DUALS(2)
- Vars
- Q(d);XP(D)::QAB1(J)
- Q(d);::QAB1(J)
- S(l);::QAB1(J)
- P(j);::QAB1(J)
- P(j);::QAR1(J)
- Refutation
- S(l);XQ(J)
- Try
- Q(J);N_PINP(j)
- Threat
- DUALS(2)
- Vars
- Q(d);XP(D)::QAB1(J)
- Q(d);::QAB1(J)
- S(l);::QAB1(J)
- P(j);::QAB1(J)
- P(j);::QAR1(J)
- Refutation
- S(l);
- Try
- Actual
- Q(J);N_PINP(j),P_SPINQ(J),XP(k)
- Threat
- QAB1(J)
- Vars
- K(g);N_SPINB(f),N_SPINR(c),P_SPINQ(d),S_FLIGHT::QAB1(J),XB(f)
- Q(d);N_SPINB(f),XR(E)::P(B)
- Q(d);XS(G)::P(B)
- Q(d);::QAR2(J)
- Q(d);N_SPINB(f)::P(B)
- Q(d);::P(B)
- P(j);N_PINQ(J)::QAB(J),XP(h)
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).