MESON Chess Problem Database

Problem Display
PID: 170492 (3N4/8/8/Kppk4/8/3b4/2R1N1PB/1Q3B2 w - - 0 1)

Nagler, Alois

Basler Nachrichten, 1940

3N4/8/8/Kppk4/8/3b4/2R1N1PB/1Q3B2

#2

8 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rd2?
      • threat
        • 2.Qxd3#
      • 1...Kc4
        • 2.Qa2#
        • 2.Qxd3#
      • 1...Ke4
        • 2.Qxd3#
      • 1...c4!
    • 1.Rxc5+?
      • 1...Ke4
        • 2.Re5#
      • 1...Kxc5!
    • 1.Qa1?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Bxc2!
    • 1.Qb2?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Bxc2!
    • 1.Qb3+?
      • 1...Ke4
        • 2.Qe6#
      • 1...Bc4
        • 2.Qf3#
      • 1...c4!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Qxd3#
      • 1...Kxc4
        • 2.Qa2#
      • 1...Bxb1
        • 2.Sc3#
      • 1...Bxe2
        • 2.Qe4#
      • 1...Bxc4
        • 2.Qf5#
      • 1...bxc4
        • 2.Qb7#
      • 1...Bc2
        • 2.Sc3#
      • 1...Be4
        • 2.Sc3#
        • 2.Qxe4#
      • 1...Bf5
        • 2.Sc3#
      • 1...Bg6
        • 2.Sc3#
      • 1...Bh7
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);P_PINB(a)
      • Threat
        • QAR2(A),XB(a)
      • Vars
        • K(d);S_FLIGHT::QAB1(A),XB(a)
      • Refutation
        • P(c);
    • Try
      • R(C);CHECK,XP(c)
      • Vars
        • K(d);OGATE,P_SPINB(a),S_FLIGHT::R1(C)
      • Refutation
        • K(d);P-FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(d);S_FLIGHT::QAR1(A)
      • Refutation
        • B(a);XR(C)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(d);S_FLIGHT::QAR1(A)
      • Refutation
        • B(a);XR(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::QAR2(A)
        • B(a);OGATE,P_SPINB(a)::QAB(A)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • R(C);
    • Threat
      • QAR2(A),XB(a)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(C)::QAB(A)
      • B(a);XQ(A)::S(D)
      • B(a);OGATE,XS(D)::QAB1(A)
      • B(a);OGATE,SBLOCK,XR(C)::QAR2(A)
      • P(b);OGATE,SBLOCK,XR(C)::QAB(A)
      • B(a);::S(D)
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