MESON Chess Problem Database

Problem Display
PID: 161750 (3KN3/1p1P1ppq/1r2kP1p/8/5P2/3Q3N/bn4R1/1Rb5 w - - 0 1)

Anders, Wilhelm

Die Schwalbe, 1932

3KN3/1p1P1ppq/1r2kP1p/8/5P2/3Q3N/bn4R1/1Rb5

#2

9 + 10

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qg8
      • 2.Qe4#
    • 1...Qh8
      • 2.Qe4#
    • 1...Sd1
      • 2.Rxb6#
    • 1...h5
      • 2.Sg5#
    • 1...gxf6
      • 2.Sc7#
    • 1...g6
      • 2.Qe4#
  • Tries
    • 1.Sxg7+?
      • 1...Kxf6
        • 2.Qc3#
        • 2.Qd4#
      • 1...Qxg7!
    • 1.Re2+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Be3!
    • 1.Qd6+?
      • 1...Kf5
        • 2.Qe5#
      • 1...Rxd6!
  • Keys
    • 1.Rg5!
      • threat
        • 2.Re5#
      • 1...Bxf4
        • 2.Sxf4#
      • 1...Sxd3
        • 2.Rxb6#
      • 1...hxg5
        • 2.Sxg5#
      • 1...gxf6
        • 2.Sc7#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Rb5
        • 2.Qd6#
      • 1...Sc4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • Q(j);N_GUARD::QAR2(C),XQ(j)
    • Q(j);N_GUARD,P_PINS(I)::QAR2(C)
    • S(c);OGATE::R(A),XR(d)
    • P(f);N_GUARD::S(D)
    • P(i);SBLOCK,XP(F)::S(I)
    • P(i);S_CUTQ(j)::QAR2(C)
  • Tries
    • Try
      • S(I);CHECK,XP(i)
      • Refutation
        • Q(j);XS(I)
    • Try
      • R(B);CHECK
      • Vars
        • Q(j);N_GUARD,P_SPINQ(j)::QAR2(C),XQ(j)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR1(C)
      • Refutation
        • R(d);P_PINP(G),XQ(C)
  • Actual
    • R(B);
    • Threat
      • R1(B)
    • Vars
      • B(a);XP(E)::S(D),XB(a)
      • S(c);OGATE,XQ(C)::R(A),XR(d)
      • P(f);XR(B)::S(D),XP(f)
      • P(i);SBLOCK,XP(F)::S(I)
      • Q(j);N_GUARD::QAR2(C),XQ(j)
      • Q(j);N_GUARD::QAB1(C),XQ(j)
      • R(d);N_GUARD::QAR1(C)
      • S(c);S_CUTB(b)::QAB1(C)
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