MESON Chess Problem Database
Problem Display
PID: 276913 (2RR4/5p2/1p1BpN2/nK1P1pQ1/2pk3r/3p1P2/1P4b1/8 w - - 0 1)
Wirtanen, Erkki Aukusti
Stella Polaris, 1971
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Qf4#
- 1...Rh2
- 2.Qf4#
- 1...Rh3
- 2.Qf4#
- 1...Rf4
- 2.Qxf4#
- 1...Rh5
- 2.Qf4#
- 1...Rh6
- 2.Qf4#
- 1...Rh7
- 2.Qf4#
- 1...Rh8
- 2.Qf4#
- 1...Bf1
- 2.Qg1#
- 1...Bh1
- 2.Qg1#
- 1...Bxf3
- 2.Qg1#
- 1...Bh3
- 2.Qg1#
- 1...Sb3
- 2.Rxc4#
- 1...Sb7
- 2.Rxc4#
- 1...d2
- 2.Qxd2#
- 1...c3
- 2.bxc3#
- 1...f4
- 2.Qe5#
- 1...Rh1
- Tries
- 1.Bg3?
- threat
- 2.dxe6#
- 1...exd5
- 2.Rxd5#
- 1...Rf4
- 2.Qxf4#
- 1...f4
- 2.Bf2#
- 1...Rh8
- 2.Qf4#
- 1...Sc6
- 2.dxc6#
- 1...Sb7
- 2.Rxc4#
- 1...e5
- 2.Bf2#
- 1...Bxf3!
- threat
- 1.Bf4?
- threat
- 2.dxe6#
- 1...Rxf4
- 2.Qxf4#
- 1...Bxf3
- 2.Qg1#
- 1...exd5
- 2.Rxd5#
- 1...Sc6
- 2.dxc6#
- 1...Sb7
- 2.Rxc4#
- 1...e5
- 2.Be3#
- 1...Rh8!
- threat
- 1.Bc7?
- threat
- 2.dxe6#
- 1...Bxf3
- 2.Qg1#
- 1...exd5
- 2.Rxd5#
- 1...Rf4
- 2.Qxf4#
- 1...f4
- 2.Bxb6#
- 2.Qe5#
- 1...Rh8
- 2.Qf4#
- 1...Sc6
- 2.dxc6#
- 1...e5
- 2.Bxb6#
- 1...Sb7!
- threat
- 1.Bb8?
- threat
- 2.dxe6#
- 1...Bxf3
- 2.Qg1#
- 1...exd5
- 2.Rxd5#
- 1...Rf4
- 2.Qxf4#
- 1...f4
- 2.Qe5#
- 1...Rh8
- 2.Qf4#
- 1...Sc6
- 2.dxc6#
- 1...Sb7
- 2.Rxc4#
- 1...e5!
- threat
- 1.Qxh4+?
- 1...f4
- 2.Qf2#
- 2.Qxf4#
- 1...Ke3!
- 1...f4
- 1.dxe6?
- threat
- 2.Bh2#
- 2.Bg3#
- 2.Bf4#
- 2.Bc7#
- 2.Bb8#
- 1...Bxf3
- 2.Qg1#
- 1...Rf4
- 2.Bxf4#
- 2.Qxf4#
- 1...f4
- 2.Bxf4#
- 2.Bc5#
- 2.Qe5#
- 1...Rh2
- 2.Bxh2#
- 2.Bg3#
- 2.Bf4#
- 2.Bc7#
- 2.Bb8#
- 2.Qf4#
- 1...Rh8
- 2.Qf4#
- 1...Sb7
- 2.Rxc4#
- 1...Sc6!
- threat
- 1.Bg3?
- Keys
- 1.Bh2!
- threat
- 2.dxe6#
- 1...Rxh2
- 2.Qf4#
- 1...Bxf3
- 2.Qg1#
- 1...exd5
- 2.Rxd5#
- 1...Rf4
- 2.Qxf4#
- 1...f4
- 2.Bg1#
- 1...Rh8
- 2.Qf4#
- 1...Sc6
- 2.dxc6#
- 1...Sb7
- 2.Rxc4#
- 1...e5
- 2.Bg1#
- threat
- 1.Bh2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 11
- Sets
- R(e);N_GUARD::QAR2(E)
- R(e);N_GUARD::QAR2(E),XR(e)
- B(a);OGATE::QAB(E)
- B(a);OGATE,XP(B)::QAB(E)
- S(f);N_GUARD::R1(H),XP(c)
- P(b);OGATEB::QAR2(E),XP(b)
- P(c);OGATE::P(A),XP(c)
- P(g);OGATE::QAB1(E)
- Tries
- Try
- B(F);
- Threat
- R(I)+P(D),XP(i)
- Vars
- P(i);OGATE,P_SPINP(i),XP(D)::R1(I),XP(i)
- R(e);N_GUARD::QAR2(E),XR(e)
- P(g);::B(F)
- R(e);N_GUARD::QAR2(E)
- S(f);OGATE::R(I)+P(D),XS(f)
- S(f);N_GUARD::R1(H),XP(c)
- P(i);SBLOCK::B(F)
- Refutation
- B(a);XP(B)
- Try
- B(F);
- Threat
- R(I)+P(D),XP(i)
- Vars
- R(e);OGATE,XB(F)::QAR2(E),XR(e)
- B(a);OGATE,XP(B)::QAB(E)
- P(i);OGATE,P_SPINP(i),XP(D)::R1(I),XP(i)
- S(f);OGATE::R(I)+P(D),XS(f)
- S(f);N_GUARD::R1(H),XP(c)
- P(i);SBLOCK::B(F)
- Refutation
- R(e);
- Try
- B(F);
- Threat
- R(I)+P(D),XP(i)
- Vars
- B(a);OGATE,XP(B)::QAB(E)
- P(i);OGATE,P_SPINP(i),XP(D)::R1(I),XP(i)
- R(e);N_GUARD::QAR2(E),XR(e)
- R(e);N_GUARD::QAR2(E)
- S(f);OGATE::R(I)+P(D),XS(f)
- P(i);SBLOCK::B(F),XP(h)
- Refutation
- S(f);
- Try
- B(F);
- Threat
- R(I)+P(D),XP(i)
- Vars
- B(a);OGATE,XP(B)::QAB(E)
- P(i);OGATE,P_SPINP(i),XP(D)::R1(I),XP(i)
- R(e);N_GUARD::QAR2(E),XR(e)
- P(g);OGATE::QAB1(E)
- R(e);N_GUARD::QAR2(E)
- S(f);OGATE::R(I)+P(D),XS(f)
- S(f);N_GUARD::R1(H),XP(c)
- Refutation
- P(i);
- Try
- Q(E);CHECK,XR(e)
- Refutation
- K(d);S_FLIGHT
- Try
- P(D);XP(i)
- Threat
- DUALS(5)
- Vars
- B(a);OGATE,XP(B)::QAB(E)
- R(e);N_GUARD::QAR2(E)
- S(f);N_GUARD::R1(H),XP(c)
- Refutation
- S(f);
- Try
- Actual
- B(F);
- Threat
- R(I)+P(D),XP(i)
- Vars
- R(e);N_GUARD,XB(F)::QAR2(E)
- B(a);OGATE,XP(B)::QAB(E)
- P(i);OGATE,P_SPINP(i),XP(D)::R1(I),XP(i)
- R(e);N_GUARD::QAR2(E),XR(e)
- P(g);::B(F)
- R(e);N_GUARD::QAR2(E)
- S(f);OGATE::R(I)+P(D),XS(f)
- S(f);N_GUARD::R1(H),XP(c)
- P(i);SBLOCK::B(F)
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