MESON Chess Problem Database
Problem Display
PID: 263981 (B4BKN/n2P1R1p/1b1R4/2pqk3/Q3Ppp1/8/8/8 w - - 0 1)
Mari, Alberto
1st Prize, Tijdschrift vd KNSB, 1935
#2
9 + 8
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qxe4
- 2.Qxe4#
- 1...Qc6
- 2.Rf5#
- 1...Qe6
- 2.Qa1#
- 1...Qb7
- 2.Rf5#
- 1...Qxf7+
- 2.Sxf7#
- 1...Qxa8
- 2.Rf5#
- 1...Qd1
- 2.Rf5#
- 1...Qd2
- 2.Rf5#
- 1...Qd3
- 2.Rf5#
- 1...Qd4
- 2.Rf5#
- 1...h5
- 2.Sg6#
- 1...h6
- 2.Sg6#
- 1...Qxe4
- Tries
- 1.Bxd5?
- threat
- 2.Re6#
- 2.Rf5#
- 2.Qa1#
- 1...Ba5
- 2.Re6#
- 2.Rf5#
- 1...Sb5
- 2.Re6#
- 2.Rf5#
- 1...Sc6
- 2.Re6#
- 2.Rf5#
- 1...c4!
- threat
- 1.Re6+?
- 1...Qxe6
- 2.Qa1#
- 1...Kxe6!
- 1...Qxe6
- 1.Qa1+?
- 1...Qd4
- 2.Rf5#
- 1...Kxe4!
- 1...Qd4
- 1.Qc4?
- threat
- 2.Qxd5#
- 1...Qxf7+
- 2.Sxf7#
- 1...Qxe4
- 2.Re6#
- 2.Qe6#
- 2.Qxe4#
- 1...Qxa8
- 2.Re6#
- 2.Rf5#
- 2.Qe6#
- 1...Qxd6
- 2.Rf5#
- 1...Qc6
- 2.Rf5#
- 2.Qe6#
- 1...Qe6
- 2.Rxe6#
- 2.Qxe6#
- 2.Qc3#
- 1...Qb7
- 2.Re6#
- 2.Rf5#
- 2.Qe6#
- 1...Qd1
- 2.Re6#
- 2.Rf5#
- 2.Qe6#
- 1...Qd2
- 2.Re6#
- 2.Rf5#
- 2.Qe6#
- 1...Qd3
- 2.Re6#
- 2.Rf5#
- 2.Qe6#
- 1...Qd4
- 2.Re6#
- 2.Rf5#
- 2.Qe6#
- 1...Qxc4!
- threat
- 1.exd5?
- threat
- 2.Re6#
- 2.Qxf4#
- 1...Sc6
- 2.Qxf4#
- 1...f3
- 2.Re6#
- 2.Qf4#
- 1...c4!
- threat
- 1.Bxd5?
- Keys
- 1.Qd1!
- threat
- 2.Qxd5#
- 1...Qxf7+
- 2.Sxf7#
- 1...Kxe4
- 2.Re6#
- 1...Qxe4
- 2.Bg7#
- 1...Qxa8
- 2.Re7#
- 1...Qxd1
- 2.Rf5#
- 1...Qxd6
- 2.Qxd6#
- 1...Qa2
- 2.Bg7#
- 1...Qb3
- 2.Bg7#
- 1...Qc4
- 2.Bg7#
- 1...Qc6
- 2.Re7#
- 1...Qe6
- 2.Qa1#
- 1...Qb7
- 2.Re7#
- 1...Qd2
- 2.Rf5#
- 1...Qd3
- 2.Rf5#
- 1...Qd4
- 2.Rf5#
- threat
- 1.Qd1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 5
- REMOVED MATES = 2
- Sets
- Q(d);N_PINR(E),OGATE,XP(B)::QAR1(A),XQ(d)
- Q(d);N_PINR(E)::R1(E)
- Q(d);N_GUARD::QAB(A)
- Q(d);CHECK,XR(E)::S(I),XQ(d)
- Q(d);N_PINR(E),P_PINB(G),XB(F)::R1(E)
- P(h);N_GUARD::S(I)
- Tries
- Try
- B(F);N_SPINR(E),XQ(d)
- Threat
- DUALS(3)
- Refutation
- P(c);
- Try
- R(C);CHECK,N_SPINR(E)
- Vars
- Q(d);P_PINR(E),SBLOCK,XR(C)::QAB(A)
- Refutation
- K(e);P-FLIGHT,XR(C)
- Try
- Q(A);CHECK
- Vars
- Q(d);N_PINR(E),P_SPINQ(d)::R1(E)
- Refutation
- K(e);P-FLIGHT,P_SPINQ(d),XP(B)
- Try
- Q(A);
- Threat
- QAR1(A),XQ(d)
- Vars
- Q(d);CHECK,XR(E)::S(I),XQ(d)
- Q(d);N_PINR(E),XR(C)::R1(E)
- Refutation
- Q(d);XQ(A)
- Try
- P(B);N_SPINR(E),XQ(d)
- Threat
- DUALS(2)
- Vars
- S(g);::QAB1(A),XP(a)
- Refutation
- P(c);
- Try
- Actual
- Q(A);
- Threat
- QAR1(A),XQ(d)
- Vars
- Q(d);CHECK,XR(E)::S(I),XQ(d)
- K(e);N_GUARD,P-FLIGHT,P_SPINQ(d),XP(B)::R(C)
- Q(d);N_PINR(E),XP(B)::B(G)
- Q(d);N_PINR(E),P_PINB(G),XB(F)::R(E)
- Q(d);N_PINR(E),XQ(A)::R1(E)
- Q(d);N_PINR(E),OGATE,XR(C)::QAB1(A),XQ(d)
- Q(d);::B(G)
- Q(d);N_PINR(E)::R(E)
- Q(d);N_GUARD::QAB(A)
- Q(d);N_PINR(E)::R1(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).