MESON Chess Problem Database

Problem Display
PID: 133687 (4rBBK/2N1p3/1p6/1PN1Pp2/1rpk1Pn1/3P4/8/2Q1R3 w - - 0 1)

Wessels, Martin

1st Prize, Dresden Olympic Ty., 2008

4rBBK/2N1p3/1p6/1PN1Pp2/1rpk1Pn1/3P4/8/2Q1R3

#2

11 + 8

23 Die Schwalbe 2008
145 StrateGems 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qxc4#
    • 1...Rb2
      • 2.Qxc4#
    • 1...Rb3
      • 2.Qxc4#
    • 1...Rxb5
      • 2.Qxc4#
    • 1...cxd3
      • 2.S5e6#
  • Tries
    • 1.Sb3+?
      • 1...Kxd3
        • 2.Qd2#
      • 1...Rxb3
        • 2.Qxc4#
      • 1...cxb3!
    • 1.Sa4?
      • threat
        • 2.Qc3#
      • 1...Kxd3
        • 2.Qd1#
        • 2.Qc3#
      • 1...Rb3
        • 2.Qxc4#
      • 1...c3
        • 2.Qxc3#
      • 1...Rxa4!
    • 1.Se4?
      • threat
        • 2.Qc3#
      • 1...Kxd3
        • 2.Qd2#
        • 2.Qd1#
        • 2.Qc3#
      • 1...Rb3
        • 2.Qxc4#
      • 1...c3
        • 2.Qxc3#
      • 1...fxe4!
    • 1.Rd1?
      • threat
        • 2.S5e6#
      • 1...Kxc5
        • 2.d4#
      • 1...cxd3
        • 2.Rxd3#
      • 1...e6
        • 2.dxc4#
      • 1...bxc5!
    • 1.Re4+?
      • 1...Kxc5
        • 2.d4#
      • 1...fxe4!
    • 1.Qb2+?
      • 1...Kxc5
        • 2.d4#
      • 1...c3
        • 2.Qxb4#
      • 1...Rxb2!
    • 1.Qd2?
      • threat
        • 2.S5e6#
      • 1...Kxc5
        • 2.d4#
      • 1...cxd3
        • 2.Qxb4#
      • 1...bxc5
        • 2.dxc4#
      • 1...e6!
    • 1.Qc3+?
      • 1...Kxc5
        • 2.d4#
      • 1...Kxc3!
  • Keys
    • 1.dxc4!
      • threat
        • 2.S7e6#
      • 1...Kxc5
        • 2.Se6#
      • 1...Rxc4
        • 2.Qxc4#
      • 1...bxc5
        • 2.Qd2#
      • 1...e6
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD::QAR1(A),XP(b)
    • R(a);N_GUARD,XP(E)::QAR1(A),XP(b)
    • P(b);SBLOCK,XP(C)::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(C)::QAR1(A)
        • R(a);XS(F)::QAR1(A),XP(b)
      • Refutation
        • P(b);XS(F)
    • Try
      • S(F);
      • Threat
        • QAB1(A)
      • Vars
        • R(a);N_GUARD::QAR1(A),XP(b)
        • P(b);::QAB1(A),XP(b)
      • Refutation
        • R(a);XS(F)
    • Try
      • S(F);
      • Threat
        • QAB1(A)
      • Vars
        • R(a);N_GUARD::QAR1(A),XP(b)
        • P(b);::QAB1(A),XP(b)
      • Refutation
        • P(e);XS(F)
    • Try
      • R(B);
      • Threat
        • S(F)
      • Vars
        • K(c);OGATE,P_SPINP(b),S_FLIGHT,XS(F)::P(C)
        • P(b);OGATE,P_SPINP(b),XP(C)::R1(B),XP(b)
        • P(g);::R(B)+P(C),XP(b)
      • Refutation
        • P(f);XS(F)
    • Try
      • R(B);CHECK
      • Vars
        • K(c);OGATE,P_SPINP(b),S_FLIGHT,XS(F)::P(C)
      • Refutation
        • P(e);XR(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,P_SPINP(g),S_FLIGHT,XS(F)::P(C)
        • P(b);OGATEB,P_SPINP(b)::QAR2(A),XR(a)
      • Refutation
        • R(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • S(F)
      • Vars
        • K(c);OGATE,P_SPINP(g),S_FLIGHT,XS(F)::P(C)
        • P(b);OGATEB,P_SPINP(b),XP(C)::QAR2(A),XR(a)
        • P(f);SBLOCK,XS(F)::QAR(A)+P(C),XP(b)
      • Refutation
        • P(g);
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,P_SPINP(b),S_FLIGHT,XS(F)::P(C)
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
  • Actual
    • P(C);XP(b)
    • Threat
      • S(H)
    • Vars
      • K(c);P_SPINP(g),S_FLIGHT,XS(F)::S(H)
      • R(a);OGATE,XP(C)::QAR1(A),XR(a)
      • P(f);SBLOCK,XS(F)::QAR2(A)
      • P(g);::R(B)
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