MESON Chess Problem Database
Problem Display
PID: 263739 (2r3B1/8/1b2P1N1/1P3RK1/2kB4/8/8/1R1Q3n w - - 0 1)
Maas, Johann H
Tijdschrift vd NSB, 1930
#2
9 + 4
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Rc7
- 2.e7#
- 1...Bxd4
- 2.Qb3#
- 1...Bc7
- 2.Rc5#
- 1...Bd8+
- 2.e7#
- 1...Rc7
- Tries
- 1.Sf4?
- threat
- 2.Qa4#
- 2.Qd3#
- 1...Bd8+
- 2.e7#
- 1...Bxd4
- 2.Qb3#
- 2.Qd3#
- 1...Ra8
- 2.Qd3#
- 1...Ba5
- 2.Qd3#
- 1...Bc5
- 2.Qd3#
- 1...Sf2
- 2.Qa4#
- 1...Rxg8+!
- threat
- 1.Ba1?
- threat
- 2.Qc2#
- 2.Qe2#
- 2.Qb3#
- 2.Qf1#
- 2.Qd5#
- 1...Bd8+
- 2.e7#
- 1...Rc5
- 2.Qc2#
- 2.Qe2#
- 2.Qb3#
- 2.Qf1#
- 2.Qd4#
- 1...Rd8
- 2.Qc2#
- 2.Qb3#
- 1...Bd4
- 2.Qe2#
- 2.Qb3#
- 2.Qf1#
- 2.Qxd4#
- 1...Ba5
- 2.Qe2#
- 2.Qb3#
- 2.Qf1#
- 2.Qd4#
- 2.Qd5#
- 1...Sf2
- 2.Qc2#
- 2.Qb3#
- 2.Qd5#
- 1...Sg3
- 2.Qc2#
- 2.Qb3#
- 2.Qd5#
- 1...Be3+!
- threat
- 1.Bxb6?
- threat
- 2.Qc2#
- 2.Qb3#
- 2.Qd4#
- 1...Rc5
- 2.Rxc5#
- 1...Rd8
- 2.Rc5#
- 2.Qc2#
- 2.Qb3#
- 1...Kc3!
- threat
- 1.Bf6?
- threat
- 2.Qc2#
- 2.Qe2#
- 2.Qb3#
- 2.Qf1#
- 2.Qd5#
- 1...Bd4
- 2.Qb3#
- 2.Qxd4#
- 1...Rc5
- 2.Qc2#
- 2.Qe2#
- 2.Qb3#
- 2.Qf1#
- 2.Qd4#
- 1...Rd8
- 2.Qc2#
- 2.Qb3#
- 1...Ba5
- 2.Qe2#
- 2.Qb3#
- 2.Qf1#
- 2.Qd4#
- 2.Qd5#
- 1...Sf2
- 2.Qc2#
- 2.Qb3#
- 2.Qd5#
- 1...Sg3
- 2.Qc2#
- 2.Qb3#
- 2.Qd5#
- 1...Be3+!
- threat
- 1.Bg7?
- threat
- 2.Qc2#
- 2.Qe2#
- 2.Qb3#
- 2.Qf1#
- 2.Qd5#
- 1...Bd8+
- 2.e7#
- 1...Bd4
- 2.Qb3#
- 2.Qxd4#
- 1...Rc5
- 2.Qc2#
- 2.Qe2#
- 2.Qb3#
- 2.Qf1#
- 2.Qd4#
- 1...Rd8
- 2.Qc2#
- 2.Qb3#
- 1...Ba5
- 2.Qe2#
- 2.Qb3#
- 2.Qf1#
- 2.Qd4#
- 2.Qd5#
- 1...Sf2
- 2.Qc2#
- 2.Qb3#
- 2.Qd5#
- 1...Sg3
- 2.Qc2#
- 2.Qb3#
- 2.Qd5#
- 1...Be3+!
- threat
- 1.Bh8?
- threat
- 2.Qc2#
- 2.Qe2#
- 2.Qb3#
- 2.Qf1#
- 2.Qd5#
- 1...Bd8+
- 2.e7#
- 1...Bd4
- 2.Qb3#
- 2.Qxd4#
- 1...Rc5
- 2.Qc2#
- 2.Qe2#
- 2.Qb3#
- 2.Qf1#
- 2.Qd4#
- 1...Rd8
- 2.Qc2#
- 2.Qb3#
- 1...Ba5
- 2.Qe2#
- 2.Qb3#
- 2.Qf1#
- 2.Qd4#
- 2.Qd5#
- 1...Sf2
- 2.Qc2#
- 2.Qb3#
- 2.Qd5#
- 1...Sg3
- 2.Qc2#
- 2.Qb3#
- 2.Qd5#
- 1...Be3+!
- threat
- 1.Rb3?
- threat
- 2.Qd3#
- 1...Bd8+
- 2.e7#
- 1...Sf2!
- threat
- 1.Qd2?
- threat
- 2.Rb4#
- 2.Qc3#
- 1...Bd8+
- 2.e7#
- 1...Bxd4
- 2.Rb4#
- 1...Bc5
- 2.Qc3#
- 1...Ba5!
- threat
- 1.Sf4?
- Keys
- 1.Rf4!
- threat
- 2.Qb3#
- 1...Rc5+
- 2.Be5#
- 1...Bd8+
- 2.e7#
- 1...Kd5
- 2.Bxb6#
- 1...Bxd4
- 2.Qxd4#
- threat
- 1.Rf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- R(d);N_GUARD::B(I)+P(G)
- B(c);SBLOCK,XB(C)::QAB1(B)
- B(c);N_GUARD,S_CUTR(d)::R1(E)
- B(c);CHECK,S_CUTR(d)::B(I)+P(G)
- Tries
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- B(c);CHECK,S_CUTR(d)::B(I)+P(G)
- R(d);::QAB1(B)
- B(c);::QAB1(B)
- S(a);::QAR2(B)
- Refutation
- R(d);CHECK,XB(I)
- Try
- B(C);
- Threat
- DUALS(5)
- Vars
- B(c);CHECK,S_CUTR(d)::B(I)+P(G)
- Refutation
- B(c);CHECK
- Try
- B(C);XB(c)
- Threat
- DUALS(3)
- Vars
- R(d);N_GUARD,P_PINR(E)::R1(E),XR(d)
- Refutation
- K(b);P-FLIGHT
- Try
- B(C);
- Threat
- DUALS(5)
- Refutation
- B(c);CHECK
- Try
- B(C);
- Threat
- DUALS(5)
- Vars
- B(c);CHECK,S_CUTR(d)::B(I)+P(G)
- Refutation
- B(c);CHECK
- Try
- B(C);
- Threat
- DUALS(5)
- Vars
- B(c);CHECK,S_CUTR(d)::B(I)+P(G)
- Refutation
- B(c);CHECK
- Try
- R(A);
- Threat
- QAB1(B)
- Vars
- B(c);CHECK,S_CUTR(d)::B(I)+P(G)
- Refutation
- S(a);
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- B(c);CHECK,S_CUTR(d)::B(I)+P(G)
- B(c);XB(C)::R1(A)
- B(c);::QAR1(B)
- Refutation
- B(c);
- Try
- Actual
- R(E);
- Threat
- QAB1(B)
- Vars
- R(d);CHECK,SBLOCK,S_CUTB(c)::R(E)+B(C)
- B(c);CHECK,S_CUTR(d)::B(I)+P(G)
- K(b);N_GUARD,S_FLIGHT::QAR(B)+B(C),XB(c)
- B(c);OGATE,P_SPINB(c),XB(C)::QAR1(B),XB(c)
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).