MESON Chess Problem Database
Problem Display
PID: 70734 (1N1R3b/5b2/R5p1/4k3/1K6/1n3QN1/8/4r3 w - - 0 1)
Overkamp, Petrus
1st Prize, Sportowiec Meredith Ty., 1959
#2
6 + 6
| 3310 | 2345 Chess Problems | 1997 |
| 5454 | Near Snap | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Qe4#
- 2.Qe3#
- 1...Rb1
- 2.Qe4#
- 2.Qe3#
- 1...Rc1
- 2.Qe4#
- 2.Qe3#
- 1...Rd1
- 2.Qe4#
- 2.Qe3#
- 1...Rf1
- 2.Qe4#
- 2.Qe3#
- 1...Rg1
- 2.Qe4#
- 2.Qe3#
- 1...Rh1
- 2.Qe4#
- 2.Qe3#
- 1...Re3
- 2.Qxe3#
- 1...Re4+
- 2.Qxe4#
- 1...Bd5
- 2.Rxd5#
- 1...Be6
- 2.Sc6#
- 1...Be8
- 2.Rd5#
- 1...Bf6
- 2.Qxf6#
- 1...Sd4
- 2.Sd7#
- 1...g5
- 2.Qf5#
- 1...Ra1
- Tries
- 1.Se2?
- threat
- 2.Sd7#
- 2.Qf4#
- 1...Rd1
- 2.Qf4#
- 1...Rf1
- 2.Sd7#
- 1...Be6
- 2.Sc6#
- 2.Qf4#
- 1...Be8
- 2.Rd5#
- 2.Rxe8#
- 2.Qd5#
- 2.Qf4#
- 1...Sc5
- 2.Qf4#
- 1...g5
- 2.Sd7#
- 1...Rxe2!
- threat
- 1.Re6+?
- 1...Bxe6
- 2.Sc6#
- 1...Kxe6!
- 1...Bxe6
- 1.Rxg6?
- threat
- 2.Sc6#
- 2.Qf5#
- 1...Re4+
- 2.Qxe4#
- 1...Bd5
- 2.Rxd5#
- 1...Bf6
- 2.Qf5#
- 2.Qxf6#
- 1...Rc1
- 2.Qe4#
- 2.Qe3#
- 2.Qf5#
- 1...Rf1
- 2.Sc6#
- 2.Qe4#
- 2.Qe3#
- 1...Be6
- 2.Sc6#
- 1...Be8
- 2.Rd5#
- 2.Qf5#
- 1...Sd4
- 2.Sd7#
- 1...Sa5
- 2.Qf5#
- 1...Bxg6!
- threat
- 1.Rd3?
- threat
- 2.Sd7#
- 1...Re4+
- 2.Qxe4#
- 1...Be6
- 2.Sc6#
- 1...Be8
- 2.Rd5#
- 1...Sc5!
- threat
- 1.Rd4?
- threat
- 2.Qf4#
- 1...Kxd4
- 2.Sc6#
- 1...Sxd4
- 2.Sd7#
- 1...Rf1
- 2.Qe4#
- 2.Qe3#
- 1...Re4
- 2.Qxe4#
- 1...g5!
- threat
- 1.Qc3+?
- 1...Sd4
- 2.Qxd4#
- 2.Qc7#
- 1...Kf4!
- 1...Sd4
- 1.Qxf7?
- threat
- 2.Sc6#
- 2.Re6#
- 2.Rd5#
- 2.Qc7#
- 1...Bf6
- 2.Qxf6#
- 2.Qc7#
- 1...Sc5
- 2.Sc6#
- 2.Rd5#
- 2.Qc7#
- 1...Rc1
- 2.Re6#
- 2.Rd5#
- 1...Rd1
- 2.Sc6#
- 2.Re6#
- 1...Sd4
- 2.Sd7#
- 2.Rd5#
- 2.Qc7#
- 1...Sa5
- 2.Rxa5#
- 2.Re6#
- 2.Rd5#
- 2.Qc7#
- 1...Re4+!
- threat
- 1.Se2?
- Keys
- 1.Qg4!
- threat
- 2.Qg5#
- 1...Re4+
- 2.Qxe4#
- 1...Be6
- 2.Rxe6#
- 1...Rf1
- 2.Qe4#
- 1...Bd5
- 2.Sd7#
- 1...Bf6
- 2.Sc6#
- 1...Sd4
- 2.Qxd4#
- 1...g5
- 2.Qf5#
- 2.Qxg5#
- threat
- 1.Qg4!
Anticipated by 178772(1952)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- R(a);N_GUARD::QAR2(A),XR(a)
- R(a);CHECK,N_GUARD::QAR1(A),XR(a)
- B(e);N_GUARD::R1(F),XB(e)
- B(e);SBLOCK::S(E)
- B(e);N_GUARD::R1(F)
- B(f);N_GUARD::QAB1(A),XB(f)
- S(b);SBLOCK::S(E)
- P(d);N_GUARD::QAR1(A)
- Tries
- Try
- S(B);
- Threat
- DUALS(2)
- Vars
- R(a);::QAB1(A)
- R(a);::S(E)
- S(b);::QAB1(A)
- P(d);::S(E)
- Refutation
- R(a);XS(B)
- Try
- R(D);CHECK
- Vars
- B(e);SBLOCK,XR(D)::S(E)
- Refutation
- K(c);P-FLIGHT,XR(D)
- Try
- R(D);XP(d)
- Threat
- DUALS(2)
- Vars
- R(a);CHECK,N_GUARD::QAR1(A),XR(a)
- B(e);N_GUARD::R1(F),XB(e)
- B(e);::S(E)
- S(b);SBLOCK::S(E)
- S(b);::QAR1(A)
- Refutation
- B(e);XR(D)
- Try
- R(F);
- Threat
- S(E)
- Vars
- R(a);CHECK,N_GUARD::QAR1(A),XR(a)
- B(e);SBLOCK::S(E)
- B(e);N_GUARD::R1(F)
- Refutation
- S(b);
- Try
- R(F);
- Threat
- QAB1(A)
- Vars
- K(c);S_FLIGHT,XR(F)::S(E)
- S(b);SBLOCK,XR(F)::S(E)
- R(a);N_GUARD,P_PINR(F)::QAR1(A),XR(a)
- Refutation
- P(d);
- Try
- Q(A);CHECK
- Refutation
- K(c);S_FLIGHT
- Try
- Q(A);XB(e)
- Threat
- DUALS(4)
- Refutation
- R(a);CHECK
- Try
- Actual
- Q(A);
- Threat
- QAR2(A)
- Vars
- R(a);CHECK,N_GUARD::QAR1(A),XR(a)
- B(e);N_GUARD::R1(D),XB(e)
- R(a);N_GUARD::QAR1(A)
- B(e);SBLOCK::S(E)
- B(f);SBLOCK::S(E)
- S(b);N_GUARD::QAB1(A),XS(b)
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).