MESON Chess Problem Database
Problem Display
PID: 37590 (2r3q1/4R2B/2p3P1/1Q2N3/R1nPk3/2P1NpP1/Kp1P4/8 w - - 0 1)
Kamstra, Hendrik Hermanus
1st Prize, Tijdschrift vd KNSB, 1948
#2
12 + 7
| 3105 | FIDE Album (1945-1955) | 1964 |
SOLUTION
- SOUND
- Sets
- 1...Qd5
- 2.g7#
- 1...Qf7
- 2.gxf7#
- 1...Qxg6
- 2.Bxg6#
- 1...Qd8
- 2.g7#
- 1...Sxd2+
- 2.Sf7#
- 1...Sa3+
- 2.Sf7#
- 1...Sxe3+
- 2.Sf7#
- 1...Sa5+
- 2.Sf7#
- 1...Sxe5+
- 2.d5#
- 1...Sb6+
- 2.Sf7#
- 1...Sd6+
- 2.Sf7#
- 1...b1Q+
- 2.Qxb1#
- 1...b1S
- 2.Qxb1#
- 1...b1B+
- 2.Qxb1#
- 1...b1R
- 2.Qxb1#
- 1...Qd5
- Tries
- 1.Sd3+?
- 1...Qe6
- 2.Sf2#
- 2.Sc5#
- 2.Qf5#
- 2.g7#
- 1...Se5+
- 2.d5#
- 1...Kxd3!
- 1...Qe6
- 1.S5xc4+?
- 1...Qe6
- 2.Qf5#
- 2.g7#
- 1...Kd3!
- 1...Qe6
- 1.S5g4+?
- 1...Qe6
- 2.Sf2#
- 2.Qf5#
- 2.g7#
- 1...Se5+
- 2.d5#
- 1...Kd3!
- 1...Qe6
- 1.Sxc6+?
- 1...Qe6
- 2.Qf5#
- 2.g7#
- 1...Se5+
- 2.d5#
- 1...Kd3!
- 1...Qe6
- 1.Sd7+?
- 1...Qe6
- 2.Sc5#
- 2.Qf5#
- 2.g7#
- 1...Se5+
- 2.d5#
- 1...Kd3!
- 1...Qe6
- 1.Sf7+?
- 1...Se5
- 2.Rxe5#
- 2.dxe5#
- 2.d5#
- 1...Kd3!
- 1...Se5
- 1.Qxc6+?
- 1...Qd5
- 2.Qxd5#
- 2.g7#
- 1...Rxc6!
- 1...Qd5
- 1.Qd5+?
- 1...Qxd5
- 2.g7#
- 1...cxd5!
- 1...Qxd5
- 1.Sd3+?
- Keys
- 1.Rf7!
- threat
- 2.Rf4#
- 1...b1Q+
- 2.Qxb1#
- 1...b1B+
- 2.Qxb1#
- 1...Qxf7
- 2.gxf7#
- 1...Sxd2
- 2.Qd3#
- 1...Sxe3
- 2.d3#
- 1...Sxe5
- 2.dxe5#
- 1...Qf8
- 2.g7#
- 1...Rf8
- 2.Qxc6#
- 1...Sa3
- 2.Qd3#
- 1...Sa5
- 2.Qd3#
- 1...Sb6
- 2.Qd3#
- 1...Sd6
- 2.Qd3#
- threat
- 1.Rf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 7
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- Q(g);N_GUARD::B(L)+P(J)
- Q(g);OGATE::B(L)+P(J),XQ(g)
- Q(g);OGATE,P_SPINQ(g),XP(J)::B(L),XQ(g)
- S(c);CHECK,N_GUARD,XP(B)::R(K)+S(I)
- S(c);CHECK,N_GUARD::R(K)+S(I)
- S(c);CHECK,N_GUARD,XS(D)::R(K)+S(I)
- S(c);CHECK,P_SPINS(c),XS(I)::R(F)+P(G)
- P(a);CHECK,OGATE::QAB(H),XQ(a)
- P(a);OGATE::QAB(H),XS(a)
- P(a);CHECK,OGATE::QAB(H),XB(a)
- P(a);OGATE::QAB(H),XR(a)
- Tries
- Try
- S(I);CHECK
- Vars
- S(c);CHECK,P_SPINS(c),S_CUTQ(g)::R(F)+P(G)
- Refutation
- K(d);P_SPINS(c),S_FLIGHT,XS(I)
- Try
- S(I);CHECK,P_SPINS(I),XS(c)
- Refutation
- K(d);S_FLIGHT
- Try
- S(I);CHECK
- Vars
- S(c);CHECK,P_SPINS(c),S_CUTQ(g)::R(F)+P(G)
- Refutation
- K(d);P_SPINS(c),S_FLIGHT
- Try
- S(I);CHECK,XP(e)
- Vars
- S(c);CHECK,P_SPINS(c),S_CUTQ(g)::R(F)+P(G)
- Refutation
- K(d);P_SPINS(c),S_FLIGHT
- Try
- S(I);CHECK
- Vars
- S(c);CHECK,P_SPINS(c),S_CUTQ(g)::R(F)+P(G)
- Refutation
- K(d);P_SPINS(c),S_FLIGHT
- Try
- S(I);CHECK
- Refutation
- K(d);P_SPINS(c),S_FLIGHT
- Try
- Q(H);CHECK,XP(e)
- Refutation
- R(f);XQ(H)
- Try
- Q(H);CHECK
- Vars
- Q(g);XQ(H)::B(L)+P(J)
- Refutation
- P(e);XQ(H)
- Try
- Actual
- R(K);
- Threat
- R1(K)
- Vars
- P(a);CHECK,OGATE::QAB(H),XQ(a)
- P(a);CHECK,OGATE::QAB(H),XB(a)
- Q(g);OGATE,XR(K)::B(L)+P(J),XQ(g)
- S(c);OGATE,P_PINR(K),XP(B)::QAB1(H)
- S(c);P_PINR(K),SBLOCK,XS(D)::P(B)
- S(c);OGATE,P_PINR(K),XS(I)::R(F)+P(G),XS(c)
- Q(g);N_GUARD::B(L)+P(J)
- R(f);N_GUARD::QAB(H),XP(e)
- S(c);OGATE,P_PINR(K)::QAB1(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).