MESON Chess Problem Database
Problem Display
PID: 243788 (8/r4p2/1N3RnK/1r2k2b/3pNppB/5Pp1/1n6/2Q5 w - - 0 1)
Thorsson, Allan Birger
Tidskrift for Schack, 1981
#2
7 + 11
SOLUTION
- SOUND
- Sets
- 1...Rb3
- 2.Qc5#
- 1...Rb4
- 2.Qc5#
- 1...Rc5
- 2.Qxc5#
- 1...Rxb6
- 2.Qc5#
- 1...Ra1
- 2.Qc7#
- 1...Ra2
- 2.Qc7#
- 1...Ra3
- 2.Qc7#
- 1...Ra4
- 2.Qc7#
- 1...Ra5
- 2.Qc7#
- 1...Ra6
- 2.Qc7#
- 1...Rc7
- 2.Qxc7#
- 1...Ra8
- 2.Qc7#
- 1...Sxh4
- 2.Qxf4#
- 1...Se7
- 2.Qxf4#
- 1...Sf8
- 2.Qxf4#
- 1...Sh8
- 2.Qxf4#
- 1...d3
- 2.Qc3#
- 1...Rb3
- Tries
- 1.Sd2?
- threat
- 2.Qe1#
- 1...Rxb6
- 2.Qc5#
- 1...d3
- 2.Qc3#
- 1...Rb3
- 2.Qc5#
- 1...Ra1
- 2.Qc7#
- 1...Ra3
- 2.Qc7#
- 1...Sd1
- 2.Sdc4#
- 1...Sd3
- 2.Sdc4#
- 1...Sc4
- 2.Sdxc4#
- 1...Sxh4!
- threat
- 1.Sf2?
- threat
- 2.Qe1#
- 1...Rxb6
- 2.Qc5#
- 1...Sxh4
- 2.Qxf4#
- 1...d3
- 2.Qc3#
- 1...Rb3
- 2.Qc5#
- 1...Ra1
- 2.Qc7#
- 1...Ra3
- 2.Qc7#
- 1...Sd1
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sc4
- 2.Sd3#
- 1...gxf2!
- threat
- 1.Sc3?
- threat
- 2.Qe1#
- 1...Sxh4
- 2.Qxf4#
- 1...dxc3
- 2.Qxc3#
- 1...Ra1
- 2.Sd7#
- 1...Sd1
- 2.Sc4#
- 1...Sd3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...d3!
- threat
- 1.Sc4+?
- 1...Kd5
- 2.Rd6#
- 1...Sxc4!
- 1...Kd5
- 1.Sd7+?
- 1...Kd5
- 2.Rd6#
- 2.Qc6#
- 1...Rxd7!
- 1...Kd5
- 1.Qc6?
- threat
- 2.Qxb5#
- 2.Qd6#
- 1...Rxb6
- 2.Qc5#
- 1...d3
- 2.Qc3#
- 2.Qd6#
- 1...Rba5
- 2.Qd6#
- 1...Rb3
- 2.Qd5#
- 2.Qc5#
- 2.Qd6#
- 1...Rb4
- 2.Qd5#
- 2.Qc5#
- 2.Qd6#
- 1...Rc5
- 2.Qxc5#
- 2.Qd6#
- 1...Rd5
- 2.Qxd5#
- 1...Raa5
- 2.Sd7#
- 2.Qd6#
- 2.Qc7#
- 1...Rc7
- 2.Qd6#
- 2.Qxc7#
- 1...Rd7
- 2.Sxd7#
- 1...Sd3
- 2.Sc4#
- 2.Qd6#
- 1...Sa4
- 2.Sc4#
- 2.Qd6#
- 1...Sc4
- 2.Sxc4#
- 2.Qxb5#
- 1...Se7
- 2.Qd6#
- 1...gxf3!
- threat
- 1.Sd2?
- Keys
- 1.Sd6!
- threat
- 2.Qe1#
- 1...Rxb6
- 2.Qc5#
- 1...Sxh4
- 2.Qxf4#
- 1...d3
- 2.Qc3#
- 1...Rb3
- 2.Qc5#
- 1...Ra1
- 2.Sxf7#
- 1...Ra3
- 2.Sxf7#
- 1...Sd1
- 2.Sdc4#
- 1...Sd3
- 2.Sdc4#
- 1...Sc4
- 2.Sdxc4#
- threat
- 1.Sd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 11
- Sets
- R(f);N_GUARD::QAR2(A)
- R(f);N_GUARD::QAR2(A),XR(f)
- R(f);N_GUARD,XS(E)::QAR2(A)
- R(j);N_GUARD::QAB(A)
- R(j);N_GUARD::QAB(A),XR(j)
- S(i);N_GUARD,XB(D)::QAB1(A),XP(d)
- S(i);N_GUARD::QAB1(A),XP(d)
- P(c);OGATEB::QAB(A)
- Tries
- Try
- S(C);
- Threat
- QAR(A)
- Vars
- R(f);N_GUARD,XS(E)::QAR2(A)
- P(c);OGATEB::QAB(A)
- R(f);N_GUARD::QAR2(A)
- R(j);N_GUARD::QAB(A)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- Refutation
- S(i);XB(D)
- Try
- S(C);
- Threat
- QAR(A)
- Vars
- R(f);N_GUARD,XS(E)::QAR2(A)
- S(i);N_GUARD,XB(D)::QAB1(A),XP(d)
- P(c);OGATEB::QAB(A)
- R(f);N_GUARD::QAR2(A)
- R(j);N_GUARD::QAB(A)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- Refutation
- P(b);XS(C)
- Try
- S(C);
- Threat
- QAR(A)
- Vars
- S(i);N_GUARD,XB(D)::QAB1(A),XP(d)
- P(c);OGATE,XS(C)::QAB(A),XP(c)
- R(j);N_GUARD::S(E)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- Refutation
- P(c);
- Try
- S(E);CHECK
- Vars
- K(g);P-FLIGHT::R1(F)
- Refutation
- S(a);XS(E)
- Try
- S(E);CHECK
- Refutation
- R(j);XS(E)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(f);N_GUARD,XS(E)::QAR2(A)
- R(f);::QAB1(A)
- R(f);N_GUARD::QAR1(A),XR(f)
- R(j);N_GUARD::S(E),XR(j)
- S(i);::QAB1(A)
- Refutation
- P(e);XP(B)
- Try
- Actual
- S(C);
- Threat
- QAR(A)
- Vars
- R(f);N_GUARD,XS(E)::QAR2(A)
- S(i);N_GUARD,XB(D)::QAB1(A),XP(d)
- P(c);OGATEB::QAB(A)
- R(f);N_GUARD::QAR2(A)
- R(j);N_GUARD::S(C),XP(k)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
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